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fish-speech-1
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defaults:
  - base
  - _self_

project: vq-gan-finetune
ckpt_path: checkpoints/vq-gan-group-fsq-2x1024.pth
resume_weights_only: true

# Lightning Trainer
trainer:
  accelerator: gpu
  devices: auto
  precision: bf16-mixed
  max_steps: 100_000
  val_check_interval: 5000
  strategy: ddp_find_unused_parameters_true

sample_rate: 44100
hop_length: 512
num_mels: 128
n_fft: 2048
win_length: 2048
freeze_encoder: true

# Dataset Configuration
train_dataset:
  _target_: fish_speech.datasets.vqgan.VQGANDataset
  filelist: data/filelist.train.txt
  sample_rate: ${sample_rate}
  hop_length: ${hop_length}
  slice_frames: 512

val_dataset:
  _target_: fish_speech.datasets.vqgan.VQGANDataset
  filelist: data/filelist.val.txt
  sample_rate: ${sample_rate}
  hop_length: ${hop_length}

data:
  _target_: fish_speech.datasets.vqgan.VQGANDataModule
  train_dataset: ${train_dataset}
  val_dataset: ${val_dataset}
  num_workers: 4
  batch_size: 16
  val_batch_size: 16

# Model Configuration
model:
  _target_: fish_speech.models.vqgan.VQGAN

  sampling_rate: ${sample_rate}
  weight_adv: 0.2
  weight_vq: 1.0
  weight_mel: 1.0
  freeze_encoder: false

  encoder:
    _target_: fish_speech.models.vqgan.modules.wavenet.WaveNet
    input_channels: ${num_mels}
    residual_channels: 768
    residual_layers: 20
    dilation_cycle: 4
  
  quantizer:
    _target_: fish_speech.models.vqgan.modules.fsq.DownsampleFiniteScalarQuantize
    input_dim: 768
    n_codebooks: 1
    n_groups: 2
    levels: [8, 5, 5, 5]

  decoder:
    _target_: fish_speech.models.vqgan.modules.wavenet.WaveNet
    output_channels: ${num_mels}
    residual_channels: 768
    residual_layers: 20
    dilation_cycle: 4
    condition_channels: 768
  
  discriminator:
    _target_: fish_speech.models.vqgan.modules.discriminator.Discriminator

  vocoder:
    _target_: fish_speech.models.vqgan.modules.firefly.FireflyBase
    ckpt_path: null # You may download the pretrained vocoder and set the path here

  encode_mel_transform:
    _target_: fish_speech.models.vqgan.spectrogram.LogMelSpectrogram
    sample_rate: ${sample_rate}
    n_fft: ${n_fft}
    hop_length: ${hop_length}
    win_length: ${win_length}
    n_mels: ${num_mels}
    f_min: 0.0
    f_max: 8000.0

  gt_mel_transform:
    _target_: fish_speech.models.vqgan.spectrogram.LogMelSpectrogram
    sample_rate: ${sample_rate}
    n_fft: ${n_fft}
    hop_length: ${hop_length}
    win_length: ${win_length}
    n_mels: ${num_mels}

  optimizer:
    _target_: torch.optim.AdamW
    _partial_: true
    lr: 4e-5
    betas: [0.8, 0.99]
    eps: 1e-5
    weight_decay: 0.01

  lr_scheduler:
    _target_: torch.optim.lr_scheduler.LambdaLR
    _partial_: true
    lr_lambda:
      _target_: fish_speech.scheduler.get_cosine_schedule_with_warmup_lr_lambda
      _partial_: true
      num_warmup_steps: 100
      num_training_steps: ${trainer.max_steps}
      final_lr_ratio: 0

callbacks:
  model_summary:
    _target_: lightning.pytorch.callbacks.ModelSummary
    max_depth: 1

  model_checkpoint:
    every_n_train_steps: ${trainer.val_check_interval}

  grad_norm_monitor:
    sub_module: 
      - encoder
      - decoder
      - quantizer
      - discriminator