NeuralCodecs 0.1.1

NeuralCodecs

NeuralCodecs is a .NET library for neural audio codec implementations, designed for efficient audio compression and reconstruction.

Features

• SNAC: Multi-Scale Neural Audio Codec

Work In Progress

• DAC: Descript Audio Codec

Requirements

• Torchsharp or libTorch targeting your desired platform

Usage

Creating/loading the model

There are several ways to load a model:

1. Using static factory method:

// Load SNAC model with static method provided for built-in models
var model = await NeuralCodecs.CreateSNACAsync("model.pt");

2. Using premade config:

   SnacConfig provides premade configurations for 24kHz, 32kHz, and 44kHz sampling rates.

var model = await NeuralCodecs.CreateSNACAsync(modelPath, SNACConfig.SNAC24Khz);

3. Using IModelLoader instance with default config

   Allows the use of custom loader implementations

// Load model with default config from IModelLoader instance
var torchLoader = NeuralCodecs.CreateTorchLoader();
var model = await torchLoader.LoadModelAsync("model.pt");

4. Using IModelLoader instance with custom config:

var config = new SNACConfig { /* ... */ };
var model = await torchLoader.LoadModelAsync("model.pt", config);

5. Using factory method for custom models:

   Allows the use of custom model implementations with built-in loaders

// Load custom model with factory method
var model = await torchLoader.LoadModelAsync(
    "model.pt",
    config => new CustomModel(config, ...),
    config);

Encoding and Decoding Audio

There are two main ways to process audio:

1. Using the simplified ProcessAudio method:

// Compress audio in one step
var processedAudio = model.ProcessAudio(audioData, sampleRate);

2. Using separate encode and decode steps:

// Encode audio to compressed format
var codes = model.Encode(buffer);

// Decode back to audio
var processedAudio = model.Decode(codes);

3. Saving the processed audio

   Use your preferred method to save WAV files

// using NAudio
await using var writer = new WaveFileWriter(
    outputPath,
    new WaveFormat(model.Config.SamplingRate, 1)
);
writer.WriteSamples(processedAudio, 0, processedAudio.Length);

Acknowledgments

• SNAC - Original SNAC implementation
• Descript Audio Codec - DAC reference

Contributing

Suggestions and contributions are welcome! Feel free to submit a pull request.

License

This project is licensed under the MIT License.