AivisSpeech Engine の音声合成APIを使ってみる


# はじめに

2024/11/19 に、AivisSpeech という新しい音声合成ソフトウェアがリリースされました。

<blockquote class="twitter-tweet"><p lang="ja" dir="ltr">🎉本日リリース🎉<br><br>【完全無料！AI音声合成の新時代がここに】<br>かんたんに感情豊かな声をつくれる、最先端の音声合成ソフト「AivisSpeech」が登場！<br><br>💠 無料で圧倒的に高品質な音声合成！<br>💠 お手元のPCで快適に動作！<br>💠 自作した音声合成モデルも使える！<br><br>今すぐ試す 👉 <a href="https://t.co/q0jONJUc2J">https://t.co/q0jONJUc2J</a> <a href="https://t.co/f8nLiP3Xwj">pic.twitter.com/f8nLiP3Xwj</a></p>&mdash; Aivis Project (@aivis_project) <a href="https://twitter.com/aivis_project/status/1858882873568489646?ref_src=twsrc%5Etfw">November 19, 2024</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

<https://aivis-project.com/>

AivisSpeech はOSSの音声合成ソフトウェアである VOICEVOX をベースに開発されており、
上記のポストにあるような自作の音声合成モデルを利用する機能などが拡張されています。

AivisSpeech 自体は、GUIアプリケーションとして提供されていますが、
AivisSpeech Engine に HTTP API の機能が搭載されています。
ソースコードはLGPL-3.0ライセンスで公開されています。

<https://github.com/Aivis-Project/AivisSpeech-Engine>

そして、AivisSpeeh EngineはAPIのエンドポイントが一部を除いてVOICEVOX互換となっており、
VOICEVOXとの併用、つまりマルチエンジン対応も可能になっています。

今回、AirvisSpeech Engine の HTTP API を使った音声合成を試してみましたので、
本記事では、その一連の流れを紹介しています。

# 前提

今回はNVIDIA GPU向けのDockerイメージをWSL2に導入しました。

## 環境

- ホストOS: Windows 11
- WSL2: Ubuntu 22.04.4 LTS
- Docker Desktop: 4.36.0 (175267)
- AivisSpeech Engine: latest (1.0.0)

## ホストマシンのスペック

- CPU: Intel Core i7-10700 @ 2.90GHz
- GPU: NVIDIA GeForce RTX 3070

# エンジンの実行

## 事前準備: CUDA Toolkitのインストール

WSL2上でNVIDIA GPUを利用するためには、CUDA Toolkitをインストールする必要があります。
以下のURLに掲載されている一連のコマンドをWSL上で実行することでインストールできます。

<https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&Distribution=WSL-Ubuntu&target_version=2.0&target_type=deb_local>

## Dockerイメージの取得とコンテナ起動

以下のコマンドで、AivisSpeech Engine のDockerイメージを取得し、コンテナを起動します。

```bash
$ docker pull ghcr.io/aivis-project/aivisspeech-engine:nvidia-latest
$ docker run --rm --gpus all -p '10101:10101' \
  -v ~/.local/share/AivisSpeech-Engine:/home/user/.local/share/AivisSpeech-Engine-Dev \
  ghcr.io/aivis-project/aivisspeech-engine:nvidia-latest
```

起動に成功すると、以下のようなログが出力されます。

```bash
$ docker run --rm --gpus all -p '10101:10101'   -v ~/.local/share/AivisSpeech-Engine:/home/user/.local/share/AivisSpeech-Engine-Dev   ghcr.io/aivis-project/aivisspeech-engine:nvidia-latest
+ exec gosu user /opt/python/bin/poetry run python ./run.py --use_gpu --host 0.0.0.0
[2024/12/04 05:20:59] INFO:     AivisSpeech Engine version latest
[2024/12/04 05:20:59] INFO:     Engine root directory: /opt/aivisspeech-engine
[2024/12/04 05:20:59] INFO:     User data directory: /home/user/.local/share/AivisSpeech-Engine-Dev
[2024/12/04 05:20:59] INFO:     Models directory: /home/user/.local/share/AivisSpeech-Engine-Dev/Models
[2024/12/04 05:21:00] INFO:     Installed AIVM models:
[2024/12/04 05:21:00] INFO:     - Anneli (a59cb814-0083-4369-8542-f51a29e72af7)
[2024/12/04 05:21:00] INFO:     Using GPU (NVIDIA CUDA) for inference.
[2024/12/04 05:21:00] INFO:     Loading BERT model and tokenizer...
[2024/12/04 05:21:05] INFO:     BERT model and tokenizer loaded. (5.47s)
[2024/12/04 05:21:05] INFO:     Compiled user dictionary applied.
[2024/12/04 05:21:06] INFO:     Started server process [1]
[2024/12/04 05:21:06] INFO:     Waiting for application startup.
[2024/12/04 05:21:06] INFO:     Application startup complete.
[2024/12/04 05:21:06] INFO:     Uvicorn running on http://0.0.0.0:10101 (Press CTRL+C to quit)
reading /home/user/.local/share/AivisSpeech-Engine-Dev/user.dict_csv-d1d730f8-aa02-4a62-9529-4876c5fd85b6.tmp ... 900516
emitting double-array: 100% |###########################################|
[2024/12/04 05:21:09] INFO:     User dictionary updated. (4.14s)
```

### トラブルシューティング

私の環境では、初めて `docker run` した際に以下のようなエラーが発生しました。

```bash
$ docker run --rm --gpus all -p '10101:10101'   -v ~/.local/share/AivisSpeech-Engine:/home/user/.local/share/AivisSpeech-Engine-Dev   ghcr.io/aivis-project/aivisspeech-engine:
nvidia-latest
- exec gosu user /opt/python/bin/poetry run python ./run.py --use_gpu --host 0.0.0.0
Traceback (most recent call last):
  File "/opt/aivisspeech-engine/./run.py", line 27, in <module>
    from voicevox_engine.aivm_manager import AivmManager
  File "/opt/aivisspeech-engine/voicevox_engine/aivm_manager.py", line 20, in <module>
    from voicevox_engine.logging import logger
  File "/opt/aivisspeech-engine/voicevox_engine/logging.py", line 14, in <module>
    ENGINE_LOG_DIR.mkdir(parents=True, exist_ok=True)
  File "/opt/python/lib/python3.11/pathlib.py", line 1116, in mkdir
    os.mkdir(self, mode)
PermissionError: [Errno 13] Permission denied: '/home/user/.local/share/AivisSpeech-Engine-Dev/Logs'
```

`docker run` の `-v` オプションで `~/.local/share/AivisSpeech-Engine` にコンテナ上のディレクトリをマウントしていますが、
コマンド実行時に自動でホストマシンに作成されたマウント先ディレクトリの所有者が `root` になっており、
Dockerコンテナからwriteできなかったのが原因だったようです。

今回は、ホストマシン側のマウント先ディレクトリを一般ユーザーで作成し直すことにより対処しました。
(所有権を直接変更しても問題ないと思います。)

```bash
$ ls -ld ~/.local/share/AivisSpeech-Engine
drwxr-xr-x 2 root root 4096 Dec  4 14:35 /home/aqua/.local/share/AivisSpeech-Engine
$ rm -rf ~/.local/share/AivisSpeech-Engine
$ mkdir ~/.local/share/AivisSpeech-Engine
$ ls -ld ~/.local/share/AivisSpeech-Engine
drwxr-xr-x 2 aqua aqua 4096 Dec  4 12:57 /home/aqua/.local/share/AivisSpeech-Engine
# aqua はホストマシンのユーザー名です
```

## APIの利用

### APIドキュメントの確認

エンジンを起動した後、ブラウザで `http://127.0.0.1:10101/docs` にアクセスすると、Swagger UI でAPIドキュメントが確認できます。

![20241204_aivis_doc.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/189802/250b8d23-77f1-1d3f-ab6c-e87466d6329f.png)

### 利用可能な話者の一覧を取得

`/speakers` にGETリクエストを送信すると、以下のように利用可能な話者の一覧が返ってきます。

```bash
curl http://127.0.0.1:10101/speakers
```

```json
[
  {
    "name": "Anneli",
    "speaker_uuid": "e756b8e4-b606-4e15-99b1-3f9c6a1b2317",
    "styles": [
      {
        "name": "ノーマル",
        "id": 888753760,
        "type": "talk"
      },
      {
        "name": "通常",
        "id": 888753761,
        "type": "talk"
      },
      {
        "name": "テンション高め",
        "id": 888753762,
        "type": "talk"
      },
      {
        "name": "落ち着き",
        "id": 888753763,
        "type": "talk"
      },
      {
        "name": "上機嫌",
        "id": 888753764,
        "type": "talk"
      },
      {
        "name": "怒り・悲しみ",
        "id": 888753765,
        "type": "talk"
      }
    ],
    "version": "1.0.0",
    "supported_features": {
      "permitted_synthesis_morphing": "NOTHING"
    }
  }
]
```

:::note info
VOICEVOXでは話者IDが0から割り振られていましたが、
AivisSpeech Engine では変則的なIDが割り振られているようです。
:::

## 音声合成のリクエスト

`/audio_query` でクエリを生成したあと、 それを `/synthesis` にPOSTすることで音声合成を実行することができます。

以下の例では、話者 `Anneli` の `ノーマル` スタイルで、`こんにちは` というテキストを音声合成しています。

### クエリの生成

```bash
curl -X 'POST' \
  'http://127.0.0.1:10101/audio_query?text=%E3%81%93%E3%82%93%E3%81%AB%E3%81%A1%E3%81%AF&speaker=888753760' \
  -H 'accept: application/json' \
  -d ''
```

<details><summary> 生成されたクエリ</summary>

```json
{
  "accent_phrases": [
    {
      "moras": [
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "チ",
          "consonant": "ch",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 5,
      "pause_mora": null,
      "is_interrogative": false
    }
  ],
  "speedScale": 1,
  "intonationScale": 1,
  "tempoDynamicsScale": 1,
  "pitchScale": 0,
  "volumeScale": 1,
  "prePhonemeLength": 0.1,
  "postPhonemeLength": 0.1,
  "pauseLength": null,
  "pauseLengthScale": 1,
  "outputSamplingRate": 44100,
  "outputStereo": false,
  "kana": "こんにちは"
}
```

</details>

クエリの各パラメータを変更することで、イントネーションなどを調整することができます。
(今回は変更せずに実行しています。各パラメータの詳細はAPIドキュメントを参照してください。)

### 音声合成の実行

hello.wav というファイルに音声合成の結果を保存します。

```bash
curl -X 'POST' \
  'http://127.0.0.1:10101/synthesis?speaker=888753760&enable_interrogative_upspeak=true' \
  -H 'accept: audio/wav' \
  -H 'Content-Type: application/json' \
  -o 'hello.wav' \
  -d '{
  "accent_phrases": [
    {
      "moras": [
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "チ",
          "consonant": "ch",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 5,
      "pause_mora": null,
      "is_interrogative": false
    }
  ],
  "speedScale": 1,
  "intonationScale": 1,
  "tempoDynamicsScale": 1,
  "pitchScale": 0,
  "volumeScale": 1,
  "prePhonemeLength": 0.1,
  "postPhonemeLength": 0.1,
  "pauseLength": null,
  "pauseLengthScale": 1,
  "outputSamplingRate": 44100,
  "outputStereo": false,
  "kana": "こんにちは"
}'
```

### 音声合成の結果

サーバー側では以下のような情報が出力されます。

```
[2024/12/04 06:17:00] INFO:     172.17.0.1:34820 - "POST /audio_query?text=%E3%81%93%E3%82%93%E3%81%AB%E3%81%A1%E3%81%AF&speaker=888753760 HTTP/1.1" 200 OK
[2024/12/04 06:17:20] INFO:     Model: Anneli / Version 1.0.0
[2024/12/04 06:17:20] INFO:     Speaker: Anneli / Style: ノーマル
[2024/12/04 06:17:20] INFO:     Running inference...
[2024/12/04 06:17:20] INFO:     Text: こんにちは
[2024/12/04 06:17:20] INFO:              Speed: 1.00 (Input: 1.00)
[2024/12/04 06:17:20] INFO:       Style Weight: 1.00 (Input: 1.00)
[2024/12/04 06:17:20] INFO:     Tempo Dynamics: 0.20 (Input: 1.00)
[2024/12/04 06:17:20] INFO:              Pitch: 1.00 (Input: 0.00)
[2024/12/04 06:17:20] INFO:             Volume: 1.00
[2024/12/04 06:17:20] INFO:        Pre-Silence: 0.10
[2024/12/04 06:17:20] INFO:       Post-Silence: 0.10
[2024/12/04 06:17:21] INFO:     Inference done. Elapsed time: 0.43 sec.
[2024/12/04 06:17:21] INFO:     172.17.0.1:50148 - "POST /synthesis?speaker=888753760&enable_interrogative_upspeak=true HTTP/1.1" 200 OK
```

結果として、以下のような音声が生成されました。
<https://github.com/user-attachments/assets/d181116f-43a2-4aca-9681-e16c07863765>

## モデルのプレロード

`/initialize_speaker` にPOSTリクエストを送信することで、指定した話者のモデルを事前にロードしておくことができます。
これを行っておくことで、音声合成の初回リクエストにかかる時間を短縮することができるようです。

```bash
curl -X 'POST' \
  'http://127.0.0.1:10101/initialize_speaker?speaker=888753760&skip_reinit=false' \
  -H 'accept: */*' \
  -d ''
```

## アルファベットの発音について

VOICEVOXでは、英単語の発音がうまくいかない場合がある(アルファベットをそのまま読んでしまう)という課題があり、
正しく読み上げるためには、事前に辞書に登録しておいたり、読み上げる前にカタカナに変換したりといった工夫が必要でした。

AivisSpeech Engine ではその課題が改善されているようです。

<blockquote class="twitter-tweet"><p lang="ja" dir="ltr">この動画でいう「Act-One」や「LivePortrait」のような単体で辞書に載っていないような単語もいい感じにカタカナ読みできるようにしてあるのがこだわりポイント<br>特に技術系記事を一発で読ませたい時に役立つはず…！ <a href="https://twitter.com/hashtag/AivisSpeech?src=hash&amp;ref_src=twsrc%5Etfw">#AivisSpeech</a> <a href="https://t.co/ThyfmfFaX4">https://t.co/ThyfmfFaX4</a></p>&mdash; Torishima / INTP (@izutorishima) <a href="https://twitter.com/izutorishima/status/1858921441137488035?ref_src=twsrc%5Etfw">November 19, 2024</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

そこで、ChatGPTに以下のような文章を生成してもらい、それを AivisSpeech Engine で読み上げてみました。

```
Pythonは、データサイエンスの分野で圧倒的な支持を得ているプログラミング言語です。
この言語の強みは、PandasやNumPyなどのライブラリを活用することで、大量のデータを効率的に処理できる点にあります。
たとえば、数百万行のデータを「DataFrame」として扱い、数行のコードで統計的な分析を行うことが可能です。
また、MatplotlibやSeabornを使えば、視覚的なデータの可視化も容易に実現できます。
```

<details><summary> 生成されたクエリ</summary>

```json
{
  "accent_phrases": [
    {
      "moras": [
        {
          "text": "パ",
          "consonant": "p",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ソ",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "サ",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ブ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ヤ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ッ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "cl",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ジ",
          "consonant": "j",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 8,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ル",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "プ",
          "consonant": "p",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ロ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "グ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ラ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ミ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "グ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ゴ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ".",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ゴ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ヨ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ミ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "パ",
          "consonant": "p",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ダ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ヤ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ム",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "パ",
          "consonant": "p",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ド",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ラ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ブ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ラ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ヨ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ル",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 8,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リョ",
          "consonant": "ry",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 6,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 7,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ショ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ル",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 5,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ".",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "バ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ウ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ヒャ",
          "consonant": "hy",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ク",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ギョ",
          "consonant": "gy",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ウ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "'",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 8,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "フ",
          "consonant": "f",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "レ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ム",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "'",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ウ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ド",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 6,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ケ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 7,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ブ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "セ",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 5,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ウ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ガ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 6,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ".",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ッ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "cl",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "プ",
          "consonant": "p",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ロ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "リ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ブ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ヤ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 9,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ボ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "バ",
          "consonant": "b",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ",",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ク",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 7,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "モ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ヨ",
          "consonant": "y",
          "consonant_length": 0,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ジ",
          "consonant": "j",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0,
          "vowel": "i",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": ".",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 7,
      "pause_mora": null,
      "is_interrogative": false
    }
  ],
  "speedScale": 1,
  "intonationScale": 1,
  "tempoDynamicsScale": 1,
  "pitchScale": 0,
  "volumeScale": 1,
  "prePhonemeLength": 0.1,
  "postPhonemeLength": 0.1,
  "pauseLength": null,
  "pauseLengthScale": 1,
  "outputSamplingRate": 44100,
  "outputStereo": false,
  "kana": "Pythonは、データサイエンスの分野で圧倒的な支持を得ているプログラミング言語です。この言語の強みは、PandasやNumPyなどのライブラリを活用することで、大量のデータを効率的に処理できる点にあります。たとえば、数百万行のデータを「DataFrame」として扱い、数行のコードで統計的な分析を行うことが可能です。また、MatplotlibやSeabornを使えば、視覚的なデータの可視化も容易に実現できます。"
}
```

</details>

合成結果:
<https://github.com/user-attachments/assets/5debf3a3-8377-4964-b8ca-3f58230a75e7>

この結果から、文中に含まれる英単語は全て問題なく読み上げられています。
例えば、 `DataFrame` のクエリを見てみると、
従来は `ディイエエティイエエエフアアルエエエムイイ` と読み上げられてしまっていたところが、
`デエタフレエム` として自然に読み上げられています。

```json
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0,
          "vowel": "a",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "フ",
          "consonant": "f",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "レ",
          "consonant": "r",
          "consonant_length": 0,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "ム",
          "consonant": "m",
          "consonant_length": 0,
          "vowel": "u",
          "vowel_length": 0,
          "pitch": 0
        },
        {
          "text": "'",
          "consonant": null,
          "consonant_length": null,
          "vowel": "pau",
          "vowel_length": 0,
          "pitch": 0
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
```

<details><summary>(参考) VOICEVOXで生成されたクエリ</summary>

```json
{
  "accent_phrases": [
    {
      "moras": [
        {
          "text": "ピ",
          "consonant": "p",
          "consonant_length": 0.11647210270166397,
          "vowel": "i",
          "vowel_length": 0.10434596985578537,
          "pitch": 5.449944496154785
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.09888916462659836,
          "pitch": 5.5960283279418945
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0.06848771125078201,
          "vowel": "a",
          "vowel_length": 0.09778345376253128,
          "pitch": 5.6040849685668945
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.08036813884973526,
          "pitch": 5.589580535888672
        },
        {
          "text": "ティ",
          "consonant": "t",
          "consonant_length": 0.08351730555295944,
          "vowel": "i",
          "vowel_length": 0.10825805366039276,
          "pitch": 5.695505142211914
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.11330384761095047,
          "pitch": 5.781085014343262
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.12365090101957321,
          "pitch": 5.901239395141602
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.086192287504673,
          "pitch": 5.946781158447266
        },
        {
          "text": "チ",
          "consonant": "ch",
          "consonant_length": 0.10664952546358109,
          "vowel": "i",
          "vowel_length": 0.0770849660038948,
          "pitch": 6.003418922424316
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.11828164011240005,
          "pitch": 6.050207614898682
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.12116283923387527,
          "pitch": 6.090602874755859
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.09290414303541183,
          "pitch": 6.113485336303711
        },
        {
          "text": "ヌ",
          "consonant": "n",
          "consonant_length": 0.06207815557718277,
          "vowel": "u",
          "vowel_length": 0.08421283215284348,
          "pitch": 6.0752058029174805
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0.05523707717657089,
          "vowel": "a",
          "vowel_length": 0.15830503404140472,
          "pitch": 5.773069858551025
        }
      ],
      "accent": 14,
      "pause_mora": {
        "text": "、",
        "consonant": null,
        "consonant_length": null,
        "vowel": "pau",
        "vowel_length": 0.31535759568214417,
        "pitch": 0
      },
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0.0791788324713707,
          "vowel": "e",
          "vowel_length": 0.10064834356307983,
          "pitch": 5.590644359588623
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.11976485699415207,
          "pitch": 5.983151435852051
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0.05507245659828186,
          "vowel": "a",
          "vowel_length": 0.08500064164400101,
          "pitch": 6.126258850097656
        },
        {
          "text": "サ",
          "consonant": "s",
          "consonant_length": 0.09527775645256042,
          "vowel": "a",
          "vowel_length": 0.12112396210432053,
          "pitch": 6.208809852600098
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.09715259075164795,
          "pitch": 6.204296588897705
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.13706454634666443,
          "pitch": 6.191609859466553
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.07458440214395523,
          "pitch": 6.078517913818359
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0.052474744617938995,
          "vowel": "u",
          "vowel_length": 0.061277613043785095,
          "pitch": 5.852043151855469
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0.05265315622091293,
          "vowel": "o",
          "vowel_length": 0.10409725457429886,
          "pitch": 5.609150409698486
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ブ",
          "consonant": "b",
          "consonant_length": 0.07080589979887009,
          "vowel": "u",
          "vowel_length": 0.11524605005979538,
          "pitch": 5.600069046020508
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.08382975310087204,
          "pitch": 5.960224628448486
        },
        {
          "text": "ヤ",
          "consonant": "y",
          "consonant_length": 0.04291022568941116,
          "vowel": "a",
          "vowel_length": 0.08775778114795685,
          "pitch": 5.932217597961426
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0.05490022897720337,
          "vowel": "e",
          "vowel_length": 0.07744181156158447,
          "pitch": 5.629036903381348
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0.1484280377626419,
          "pitch": 5.438242435455322
        },
        {
          "text": "ッ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "cl",
          "vowel_length": 0.07073838263750076,
          "pitch": 0
        },
        {
          "text": "ト",
          "consonant": "t",
          "consonant_length": 0.06211525946855545,
          "vowel": "o",
          "vowel_length": 0.08425780385732651,
          "pitch": 5.901317596435547
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.09729136526584625,
          "pitch": 5.969064712524414
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0.05663037300109863,
          "vowel": "e",
          "vowel_length": 0.08706774562597275,
          "pitch": 6.025557994842529
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0.05723033845424652,
          "vowel": "i",
          "vowel_length": 0.047131218016147614,
          "pitch": 6.072211265563965
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0.04929392784833908,
          "vowel": "a",
          "vowel_length": 0.09504448622465134,
          "pitch": 6.081124782562256
        }
      ],
      "accent": 7,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0.07959704101085663,
          "vowel": "i",
          "vowel_length": 0.0804038718342781,
          "pitch": 6.144299507141113
        },
        {
          "text": "ジ",
          "consonant": "j",
          "consonant_length": 0.07773097604513168,
          "vowel": "i",
          "vowel_length": 0.07793501764535904,
          "pitch": 6.166547775268555
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.1248132511973381,
          "pitch": 6.084077835083008
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.10704737156629562,
          "pitch": 5.938371658325195
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0.06342015415430069,
          "vowel": "e",
          "vowel_length": 0.10860324651002884,
          "pitch": 5.799697399139404
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.07069236785173416,
          "pitch": 5.629647731781006
        },
        {
          "text": "ル",
          "consonant": "r",
          "consonant_length": 0.04299464076757431,
          "vowel": "u",
          "vowel_length": 0.08757925778627396,
          "pitch": 5.4380388259887695
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "プ",
          "consonant": "p",
          "consonant_length": 0.06904631108045578,
          "vowel": "u",
          "vowel_length": 0.0594872310757637,
          "pitch": 5.409878730773926
        },
        {
          "text": "ロ",
          "consonant": "r",
          "consonant_length": 0.03905259817838669,
          "vowel": "o",
          "vowel_length": 0.0911882072687149,
          "pitch": 5.505580902099609
        },
        {
          "text": "グ",
          "consonant": "g",
          "consonant_length": 0.06128575652837753,
          "vowel": "u",
          "vowel_length": 0.0694003701210022,
          "pitch": 5.707350254058838
        },
        {
          "text": "ラ",
          "consonant": "r",
          "consonant_length": 0.04014255106449127,
          "vowel": "a",
          "vowel_length": 0.10773012787103653,
          "pitch": 5.847405433654785
        },
        {
          "text": "ミ",
          "consonant": "m",
          "consonant_length": 0.0762600377202034,
          "vowel": "i",
          "vowel_length": 0.11173645406961441,
          "pitch": 5.948212623596191
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.0764211043715477,
          "pitch": 6.020254135131836
        },
        {
          "text": "グ",
          "consonant": "g",
          "consonant_length": 0.04909630864858627,
          "vowel": "u",
          "vowel_length": 0.07857421785593033,
          "pitch": 6.063906669616699
        },
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0.06576967239379883,
          "vowel": "e",
          "vowel_length": 0.15068034827709198,
          "pitch": 6.157106399536133
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.06534631550312042,
          "pitch": 6.226661682128906
        },
        {
          "text": "ゴ",
          "consonant": "g",
          "consonant_length": 0.044613003730773926,
          "vowel": "o",
          "vowel_length": 0.07870868593454361,
          "pitch": 6.147334575653076
        },
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0.05973442643880844,
          "vowel": "e",
          "vowel_length": 0.10202005505561829,
          "pitch": 5.862994194030762
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0.06595473736524582,
          "vowel": "U",
          "vowel_length": 0.09269415587186813,
          "pitch": 0
        }
      ],
      "accent": 8,
      "pause_mora": {
        "text": "、",
        "consonant": null,
        "consonant_length": null,
        "vowel": "pau",
        "vowel_length": 0.36131060123443604,
        "pitch": 0
      },
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "コ",
          "consonant": "k",
          "consonant_length": 0.09516528993844986,
          "vowel": "o",
          "vowel_length": 0.06781398504972458,
          "pitch": 5.505016326904297
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0.05592925101518631,
          "vowel": "o",
          "vowel_length": 0.09946737438440323,
          "pitch": 5.748182773590088
        }
      ],
      "accent": 2,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0.06155547499656677,
          "vowel": "e",
          "vowel_length": 0.14945416152477264,
          "pitch": 6.0509209632873535
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.07178374379873276,
          "pitch": 6.172045707702637
        },
        {
          "text": "ゴ",
          "consonant": "g",
          "consonant_length": 0.04337330907583237,
          "vowel": "o",
          "vowel_length": 0.07962529361248016,
          "pitch": 6.088384628295898
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0.05300658196210861,
          "vowel": "o",
          "vowel_length": 0.09286292642354965,
          "pitch": 5.735976219177246
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0.09484250098466873,
          "vowel": "u",
          "vowel_length": 0.06796897202730179,
          "pitch": 5.496433258056641
        },
        {
          "text": "ヨ",
          "consonant": "y",
          "consonant_length": 0.056066691875457764,
          "vowel": "o",
          "vowel_length": 0.08405620604753494,
          "pitch": 5.579542636871338
        },
        {
          "text": "ミ",
          "consonant": "m",
          "consonant_length": 0.06550165265798569,
          "vowel": "i",
          "vowel_length": 0.07494194060564041,
          "pitch": 5.686807155609131
        },
        {
          "text": "ワ",
          "consonant": "w",
          "consonant_length": 0.07060857862234116,
          "vowel": "a",
          "vowel_length": 0.16270872950553894,
          "pitch": 5.654221057891846
        }
      ],
      "accent": 3,
      "pause_mora": {
        "text": "、",
        "consonant": null,
        "consonant_length": null,
        "vowel": "pau",
        "vowel_length": 0.30311113595962524,
        "pitch": 0
      },
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ピ",
          "consonant": "p",
          "consonant_length": 0.10981322079896927,
          "vowel": "i",
          "vowel_length": 0.10163123905658722,
          "pitch": 5.597873687744141
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.1164672002196312,
          "pitch": 5.80003023147583
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.1419031172990799,
          "pitch": 5.9253668785095215
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.10216100513935089,
          "pitch": 5.980390548706055
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.10106061398983002,
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        {
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        {
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        {
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        {
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        {
          "text": "ヤ",
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    {
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        {
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        {
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        {
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        {
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        {
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        {
          "text": "ワ",
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        {
          "text": "ナ",
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        {
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    {
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        {
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        {
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      "accent": 1,
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    {
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        {
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        {
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        {
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      "accent": 4,
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    {
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        {
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      "accent": 2,
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    {
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      "accent": 2,
      "pause_mora": {
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        "consonant_length": null,
        "vowel": "pau",
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    },
    {
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        {
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      "accent": 5,
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        {
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        {
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        {
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        {
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        {
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        {
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      "accent": 3,
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        {
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        {
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      "accent": 3,
      "pause_mora": {
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        "vowel": "pau",
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      "is_interrogative": false
    },
    {
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        {
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      "accent": 2,
      "pause_mora": {
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        "vowel": "pau",
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        "pitch": 0
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      "is_interrogative": false
    },
    {
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        {
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        {
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        {
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      ],
      "accent": 4,
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    },
    {
      "moras": [
        {
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        },
        {
          "text": "ン",
          "consonant": null,
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          "vowel": "N",
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          "pitch": 6.02802848815918
        },
        {
          "text": "ギョ",
          "consonant": "gy",
          "consonant_length": 0.06927255541086197,
          "vowel": "o",
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          "pitch": 6.128126621246338
        },
        {
          "text": "オ",
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          "vowel": "o",
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          "pitch": 6.166011333465576
        },
        {
          "text": "ノ",
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          "vowel": "o",
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      ],
      "accent": 2,
      "pause_mora": null,
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    },
    {
      "moras": [
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        {
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        {
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        {
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          "vowel": "u",
          "vowel_length": 0.0818912461400032,
          "pitch": 5.9774556159973145
        },
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0.13850265741348267,
          "pitch": 6.0510663986206055
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.08670908957719803,
          "pitch": 6.0619964599609375
        },
        {
          "text": "ビ",
          "consonant": "b",
          "consonant_length": 0.07306835800409317,
          "vowel": "i",
          "vowel_length": 0.093415267765522,
          "pitch": 5.99208927154541
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.09047356992959976,
          "pitch": 5.857359409332275
        },
        {
          "text": "ヤ",
          "consonant": "y",
          "consonant_length": 0.06511764973402023,
          "vowel": "a",
          "vowel_length": 0.10088754445314407,
          "pitch": 5.528942108154297
        }
      ],
      "accent": 21,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.08468779176473618,
          "pitch": 4.988835334777832
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0.10707486420869827,
          "vowel": "u",
          "vowel_length": 0.09321016818284988,
          "pitch": 5.2716474533081055
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.12697571516036987,
          "pitch": 5.438939571380615
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.12282071262598038,
          "pitch": 5.687595844268799
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.11754288524389267,
          "pitch": 5.82954740524292
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.1028735563158989,
          "pitch": 5.887553691864014
        },
        {
          "text": "ビ",
          "consonant": "b",
          "consonant_length": 0.07227369397878647,
          "vowel": "i",
          "vowel_length": 0.1123097762465477,
          "pitch": 5.865238189697266
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.10485080629587173,
          "pitch": 5.891720771789551
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.12934981286525726,
          "pitch": 5.989195823669434
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.12075302749872208,
          "pitch": 6.059061050415039
        },
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0.11441995948553085,
          "pitch": 6.1073102951049805
        },
        {
          "text": "ア",
          "consonant": null,
          "consonant_length": null,
          "vowel": "a",
          "vowel_length": 0.11967862397432327,
          "pitch": 6.132925033569336
        },
        {
          "text": "ル",
          "consonant": "r",
          "consonant_length": 0.04475487023591995,
          "vowel": "u",
          "vowel_length": 0.08161141723394394,
          "pitch": 6.140974998474121
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.10019857436418533,
          "pitch": 6.143551349639893
        },
        {
          "text": "ヌ",
          "consonant": "n",
          "consonant_length": 0.06496862322092056,
          "vowel": "u",
          "vowel_length": 0.07755625993013382,
          "pitch": 6.034786701202393
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.12710608541965485,
          "pitch": 5.723551273345947
        }
      ],
      "accent": 16,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0.07276459783315659,
          "vowel": "U",
          "vowel_length": 0.06307903677225113,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0.08030062168836594,
          "vowel": "a",
          "vowel_length": 0.12323544174432755,
          "pitch": 5.739980697631836
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.09613583236932755,
          "pitch": 5.788263320922852
        },
        {
          "text": "バ",
          "consonant": "b",
          "consonant_length": 0.05542264133691788,
          "vowel": "a",
          "vowel_length": 0.1560276746749878,
          "pitch": 5.637535095214844
        }
      ],
      "accent": 3,
      "pause_mora": {
        "text": "、",
        "consonant": null,
        "consonant_length": null,
        "vowel": "pau",
        "vowel_length": 0.30613061785697937,
        "pitch": 0
      },
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0.06538461893796921,
          "vowel": "I",
          "vowel_length": 0.05911170691251755,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0.05888736993074417,
          "vowel": "a",
          "vowel_length": 0.08822593837976456,
          "pitch": 5.928423881530762
        },
        {
          "text": "ク",
          "consonant": "k",
          "consonant_length": 0.05211504548788071,
          "vowel": "u",
          "vowel_length": 0.048504769802093506,
          "pitch": 6.071099281311035
        },
        {
          "text": "テ",
          "consonant": "t",
          "consonant_length": 0.05428486317396164,
          "vowel": "e",
          "vowel_length": 0.09488621354103088,
          "pitch": 6.035956382751465
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0.0612785741686821,
          "vowel": "i",
          "vowel_length": 0.051526837050914764,
          "pitch": 6.003755569458008
        },
        {
          "text": "ナ",
          "consonant": "n",
          "consonant_length": 0.05272102355957031,
          "vowel": "a",
          "vowel_length": 0.09976742416620255,
          "pitch": 5.922281742095947
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0.05786009132862091,
          "vowel": "e",
          "vowel_length": 0.08060640841722488,
          "pitch": 5.838850975036621
        },
        {
          "text": "エ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "e",
          "vowel_length": 0.10772784799337387,
          "pitch": 6.055526256561279
        },
        {
          "text": "タ",
          "consonant": "t",
          "consonant_length": 0.05102948099374771,
          "vowel": "a",
          "vowel_length": 0.07485056668519974,
          "pitch": 5.975678443908691
        },
        {
          "text": "ノ",
          "consonant": "n",
          "consonant_length": 0.053867585957050323,
          "vowel": "o",
          "vowel_length": 0.08666542172431946,
          "pitch": 5.62253999710083
        }
      ],
      "accent": 1,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0.06830106675624847,
          "vowel": "a",
          "vowel_length": 0.10001389682292938,
          "pitch": 5.4681220054626465
        },
        {
          "text": "シ",
          "consonant": "sh",
          "consonant_length": 0.03910141438245773,
          "vowel": "I",
          "vowel_length": 0.06169702857732773,
          "pitch": 0
        },
        {
          "text": "カ",
          "consonant": "k",
          "consonant_length": 0.06668663769960403,
          "vowel": "a",
          "vowel_length": 0.08050308376550674,
          "pitch": 5.718845367431641
        },
        {
          "text": "モ",
          "consonant": "m",
          "consonant_length": 0.06347890198230743,
          "vowel": "o",
          "vowel_length": 0.09668878465890884,
          "pitch": 5.7357072830200195
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ヨ",
          "consonant": "y",
          "consonant_length": 0.0721202865242958,
          "vowel": "o",
          "vowel_length": 0.0897517129778862,
          "pitch": 5.706452369689941
        },
        {
          "text": "オ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "o",
          "vowel_length": 0.10947959125041962,
          "pitch": 5.806802272796631
        },
        {
          "text": "イ",
          "consonant": null,
          "consonant_length": null,
          "vowel": "i",
          "vowel_length": 0.07395301014184952,
          "pitch": 5.84182071685791
        },
        {
          "text": "ニ",
          "consonant": "n",
          "consonant_length": 0.06408850103616714,
          "vowel": "i",
          "vowel_length": 0.08724123984575272,
          "pitch": 5.840785503387451
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "ジ",
          "consonant": "j",
          "consonant_length": 0.057947076857089996,
          "vowel": "i",
          "vowel_length": 0.07397115975618362,
          "pitch": 5.680322647094727
        },
        {
          "text": "ツ",
          "consonant": "ts",
          "consonant_length": 0.0843447670340538,
          "vowel": "u",
          "vowel_length": 0.05556487292051315,
          "pitch": 5.711482524871826
        },
        {
          "text": "ゲ",
          "consonant": "g",
          "consonant_length": 0.0639617070555687,
          "vowel": "e",
          "vowel_length": 0.1436133086681366,
          "pitch": 5.7915754318237305
        },
        {
          "text": "ン",
          "consonant": null,
          "consonant_length": null,
          "vowel": "N",
          "vowel_length": 0.06646636128425598,
          "pitch": 5.912050247192383
        }
      ],
      "accent": 4,
      "pause_mora": null,
      "is_interrogative": false
    },
    {
      "moras": [
        {
          "text": "デ",
          "consonant": "d",
          "consonant_length": 0.03959709405899048,
          "vowel": "e",
          "vowel_length": 0.09000203758478165,
          "pitch": 5.889118194580078
        },
        {
          "text": "キ",
          "consonant": "k",
          "consonant_length": 0.06520184129476547,
          "vowel": "i",
          "vowel_length": 0.05073026567697525,
          "pitch": 6.0071330070495605
        },
        {
          "text": "マ",
          "consonant": "m",
          "consonant_length": 0.06367786973714828,
          "vowel": "a",
          "vowel_length": 0.1216253861784935,
          "pitch": 6.0617876052856445
        },
        {
          "text": "ス",
          "consonant": "s",
          "consonant_length": 0.07545843720436096,
          "vowel": "U",
          "vowel_length": 0.10259313136339188,
          "pitch": 0
        }
      ],
      "accent": 3,
      "pause_mora": null,
      "is_interrogative": false
    }
  ],
  "speedScale": 1,
  "pitchScale": 0,
  "intonationScale": 1,
  "volumeScale": 1,
  "prePhonemeLength": 0.1,
  "postPhonemeLength": 0.1,
  "pauseLength": null,
  "pauseLengthScale": 1,
  "outputSamplingRate": 24000,
  "outputStereo": false,
  "kana": "ピイワイティイエイチオオエヌワ'、デエタサ'イエンスノ/ブ'ンヤデ/アットオテキナ'/シ'ジオ/エ'テ/イル'/プログラミングゲ'ンゴデ_ス、コノ'/ゲ'ンゴノ/ツヨミ'ワ、ピイエエエヌディイエエエスヤ'/エヌユウエムピイワイナドノ'/ラ'イブラリオ/カツヨオ'/スル'/コト'デ、タイリョオノ'/デ'エタオ/コオリツ'テキニ/ショ'リ/デキ'ル/テンニ'/アリマ'_ス、タト'エバ、スウヒャク'/マン'ギョオノ/デ'エタオ、ディイエエティイエエエフアアルエエエムイイ'、ト'/_シテ'/ア_ツカイ'、スウコオノ'/コ'オドデ/トオケエ'テキナ/ブンセキオ'/オコナウ'/コト'ガ/カノオデ'_ス、マタ'、エムエエティイピイエルオオティイエルアイビイヤ'/エスイイエエビイオオアアルエヌオ'/_ツカエ'バ、_シカク'テキナ/デ'エタノ/カ_シカモ'/ヨオイニ'/ジツゲン'/デキマ'_ス"
}
```

</details>

# おわりに

本記事では、Aivis Speech Engine のAPIを使って、音声合成を行う一連の流れをご紹介しました。
今回はローカル環境での実行を前提としていましたが、もちろんクラウド上に構築してサービスに組み込むことも可能です。
また、従量課金制のHTTP APIサービスも現在開発中のようです。

なお、Aivis Hubという音声合成モデルの共有サービスも提供されており、
今後、利用可能なモデルが徐々に増えていきそうです。
<https://hub.aivis-project.com/>

関連するサービス含め絶賛開発中のようですので、今後のアップデートに期待です。