General Purpose Audio Effect Removal

Removing multiple audio effects from multiple sources using compositional audio effect removal and source separation and speech enhancement models.

This repo contains the code for the paper General Purpose Audio Effect Removal. (Todo: Link broken, Add video, Add img, citation, license)

Setup

git clone https://github.com/mhrice/RemFx.git
cd RemFx
git submodule update --init --recursive
pip install -e . ./umx

Usage

This repo can be used for many different tasks. Here are some examples.

Run RemFX Detect on a single file

First, need to download the checkpoints from zenodo

scripts/download_checkpoints.sh
scripts/remfx_detect.sh wet.wav -o dry.wav

Download the General Purpose Audio Effect Removal evaluation datasets

scripts/download_eval_datasets.sh

Download the starter datasets

python scripts/download.py vocalset guitarset dsd100 idmt-smt-drums

By default, the starter datasets are downloaded to ./data/remfx-data. To change this, pass --output_dir={path/to/datasets} to download.py

Then set the dataset root :

export DATASET_ROOT={path/to/datasets}

Training

Before training, it is important that you have downloaded the starter datasets (see above) and set $DATASET_ROOT. This project uses the pytorch-lightning framework and hydra for configuration management. All experiments are defined in cfg/exp/. To train with an existing experiment run

python scripts/train.py +exp={experiment_name}

Here are some selected experiment types from the paper, which use different datasets and configurations. See cfg/exp/ for a full list of experiments and parameters.

Experiment Type	Config Name	Example
Effect-specific	{effect}	+exp=chorus
Effect-specific + FXAug	{effect}_aug	+exp=chorus_aug
Monolithic (1 FX)	5-1	+exp=5-1
Monolithic (<=5 FX)	5-5_full	+exp=5-5_full
Classifier	5-5_full_cls	+exp=5-5_full_cls

To change the configuration, simply edit the experiment file, or override the configuration on the command line. A description of some of these variables is in the Misc. section below. You can also create a custom experiment by creating a new experiment file in cfg/exp/ and overriding the default parameters in config.yaml.

At the end of training, the train script will automatically evaluate the test set using the best checkpoint (by validation loss). If epoch 0 is not finished, it will throw an error. To evaluate a specific checkpoint, run

python scripts/test.py +exp={experiment_name} +ckpt_path="{path/to/checkpoint}" render_files=False

The checkpoints will be saved in ./logs/ckpts/{timestamp} Metrics and hyperparams will be logged in ./lightning_logs/{timestamp}

By default, the dataset needed for the experiment is generated before training. If you have generated the dataset separately (see Generate datasets used in the paper), be sure to set render_files=False in the config or command-line, and set render_root={path/to/dataset} if it is in a custom location.

Also note that the training assumes you have a GPU. To train on CPU, set accelerator=null in the config or command-line.

Evaluate models on the General Purpose Audio Effect Removal evaluation datasets (Table 4 from the paper)

First download the General Purpose Audio Effect Removal evaluation datasets (see above). To use the pretrained RemFX model, download the checkpoints

scripts/download_checkpoints.sh

Then run the evaluation script, select the RemFX configuration, between remfx_oracle, remfx_detect, and remfx_all. Then select N, the number of effects to remove.

scripts/eval.sh remfx_detect 0-0
scripts/eval.sh remfx_detect 1-1
scripts/eval.sh remfx_detect 2-2
scripts/eval.sh remfx_detect 3-3
scripts/eval.sh remfx_detect 4-4
scripts/eval.sh remfx_detect 5-5

To eval a custom monolithic model, first train a model (see Training) Then run the evaluation script, with the config used and checkpoint_path.

scripts/eval.sh distortion_aug 0-0 -ckpt "logs/ckpts/2023-07-26-10-10-27/epoch\=05-valid_loss\=8.623.ckpt"

To eval a custom effect-specific model as part of the inference chain, first train a model (see Training), then edit cfg/exp/remfx_{desired_configuration}.yaml -> ckpts -> {effect}. Then run the evaluation script.

scripts/eval.sh remfx_detect 0-0

The script assumes that RemFX_eval_datasets is in the top-level directory. Metrics and hyperparams will be logged in ./lightning_logs/{timestamp}

Generate other datasets

The datasets used in the experiments are customly generated from the starter datasets. In short, for each training/val/testing example, we select a random 5.5s segment from one of the starter datasets and apply a random number of effects to it. The number of effects applied is controlled by the num_kept_effects and num_removed_effects parameters. The effects applied are controlled by the effects_to_keep and effects_to_remove parameters.

Before generating datasets, it is important that you have downloaded the starter datasets (see above) and set $DATASET_ROOT.

To generate one of the datasets used in the paper, use of the experiments defined in cfg/exp/. For example, to generate the chorus FXAug dataset, which includes files with 5 possible effects, up to 4 kept effects (distortion, reverb, compression, delay), and 1 removed effects (chorus), run

python scripts/generate_dataset.py +exp=chorus_aug

See the Misc. section below for a description of the parameters. By default, files are rendered to {render_root} / processed / {string_of_effects} / {train|val|test}.

If training, this process will be done automatically at the start of training. To disable this, set render_files=False in the config or command-line, and set render_root={path/to/dataset} if it is in a custom location.

Misc.

Experimental parameters

Some relevant dataset/training parameters descriptions

num_kept_effects={[min, max]} range of Kept effects to apply to each file. Inclusive.
num_removed_effects={[min, max]} range of Removed effects to apply to each file. Inclusive.
model={model} architecture to use (see 'Effect Removal Models/Effect Classification Models')
effects_to_keep={[effect]} Effects to apply but not remove (see 'Effects'). Used for FXAug.
effects_to_remove={[effect]} Effects to remove (see 'Effects')
accelerator=null/'gpu' Use GPU (1 device) (default: null)
render_files=True/False Render files. Disable to skip rendering stage (default: True)
render_root={path/to/dir}. Root directory to render files to (default: ./data)
datamodule.train_batch_size={batch_size}. Change batch size (default: varies)

Effect Removal Models

umx
demucs
tcn
dcunet
dptnet

Effect Classification Models

cls_vggish
cls_panns_pt
cls_wav2vec2
cls_wav2clip

Effects

chorus
compressor
distortion
reverb
delay