巨擘OpenMMLab将开源综合音频生成项目：Amphion

  项目地址：https://github.com/open-mmlab/Amphion

TTS: Text-to-Speech

Amphion achieves state-of-the-art performance when compared with existing open-source repositories on text-to-speech (TTS) systems. It supports the following models or architectures:

• FastSpeech2: A non-autoregressive TTS architecture that utilizes feed-forward Transformer blocks.

• VITS: An end-to-end TTS architecture that utilizes conditional variational autoencoder with adversarial learning

• Vall-E: A zero-shot TTS architecture that uses a neural codec language model with discrete codes.

• NaturalSpeech2: An architecture for TTS that utilizes a latent diffusion model to generate natural-sounding voices.

SVC: Singing Voice Conversion

• Ampion supports multiple content-based features from various pretrained models, including WeNet, Whisper, and ContentVec. Their specific roles in SVC has been investigated in our NeurIPS 2023 workshop paper.

• Amphion implements several state-of-the-art model architectures, including diffusion-, transformer-, VAE- and flow-based models. The diffusion-based architecture uses Bidirectional dilated CNN as a backend and supports several sampling algorithms such as DDPM, DDIM, and PNDM. Additionally, it supports single-step inference based on the Consistency Model.

TTA: Text-to-Audio

Amphion supports the TTA with a latent diffusion model. It is designed like AudioLDM Make-an-Audio and AUDIT. It is also the official implementation of the text-to-audio generation part of our NeurIPS 2023 paper.

Vocoder

• Amphion supports various widely-used neural vocoders, including:

  • GAN-based vocoders: MelGAN, HiFi-GAN, NSF-HiFiGAN, BigVGAN, APNet.

  • Flow-based vocoders: WaveGlow.

  • Diffusion-based vocoders: Diffwave.

  • Auto-regressive based vocoders: WaveNet, WaveRNN.

• Amphion provides the official implementation of Multi-Scale Constant-Q Transfrom Discriminator. It can be used to enhance any architecture GAN-based vocoders during training, and keep the inference stage (such as memory or speed) unchanged.

Evaluation

Amphion provides a comprehensive objective evaluation of the generated audio. The evaluation metrics contain:

• F0 Modeling: F0 Pearson Coefficients, F0 Periodicity Root Mean Square Error, F0 Root Mean Square Error, Voiced/Unvoiced F1 Score, etc.

• Energy Modeling: Energy Root Mean Square Error, Energy Pearson Coefficients, etc.

• Intelligibility: Character/Word Error Rate, which can be calculated based on Whisper and more.

• Spectrogram Distortion: Frechet Audio Distance (FAD), Mel Cepstral Distortion (MCD), Multi-Resolution STFT Distance (MSTFT), Perceptual Evaluation of Speech Quality (PESQ), Short Time Objective Intelligibility (STOI), etc.

• Speaker Similarity: Cosine similarity, which can be calculated based on RawNet3, WeSpeaker, and more.

Datasets

Amphion unifies the data preprocess of the open-source datasets including AudioCaps, LibriTTS, LJSpeech, M4Singer, Opencpop, OpenSinger, SVCC, VCTK, and more. The supported dataset list can be seen here (updating).

 Installation

git clone https://github.com/open-mmlab/Amphion.git
cd Amphion

# Install Python Environment
conda create --name amphion python=3.9.15
conda activate amphion

# Install Python Packages Dependencies
sh env.sh

 Usage in Python

We detail the instructions of different tasks in the following recipes:

• Text-to-Speech (TTS)

• Singing Voice Conversion (SVC)

• Text-to-Audio (TTA)

• Vocoder

• Evaluation

 Acknowled

• ming024's FastSpeech2 and jaywalnut310's VITS for model architecture code.

• lifeiteng's VALL-E for training pipeline and model architecture design.

• WeNet, Whisper, ContentVec, and RawNet3 for pretrained models and inference code.

• HiFi-GAN for GAN-based Vocoder's architecture design and training strategy.

• Encodec for well-organized GAN Discriminator's architecture and basic blocks.

• Latent Diffusion for model architecture design.

• TensorFlowTTS for preparing the MFA tools.

©️ License

Amphion is under the MIT License. It is free for both research and commercial use cases.

Citations

Stay tuned, Coming soon!