0.4.2

hpcaitech/Open-Sora0.4.2May 19, 2025by edwko

AI Summary

OuteTTS v0.4.2 introduces fade-in and fade-out audio decoding to prevent clipping artifacts, adds high-throughput batched decoding interfaces (EXL2, VLLM, llama.cpp), and adds support for the new OuteTTS 1.0 0.6B model.

Key Highlights

Fade-in / Fade-out Audio Decoding to eliminate clipping artifacts
Batched Decoding Interfaces (EXL2 Async, VLLM, llama.cpp Async Server)
Single-Stream Decoding endpoint for llama.cpp
OuteTTS 1.0 0.6B Model Support
Enhanced pre-prompt normalization pipeline

New Features

Fade-in and fade-out audio decoding
EXL2 Async batch processing
VLLM asynchronous batch decoding
llama.cpp Async Server Endpoint
llama.cpp Single-Stream Decoding Endpoint
OuteTTS 1.0 0.6B compatibility
Batched interface parameters
Enhanced pre-prompt normalization

Full Release Notes

# OuteTTS v0.4.2

* **Fade-in / Fade-out Audio Decoding**
  Introduced quick fade-in and fade-out on decoded audio chunks to eliminate clipping artifacts at segment boundaries.

* **Batched Decoding Interfaces**
  Added support for high-throughput, batched inference via three new backends:

  * **EXL2 Async**: Asynchronous batch processing using the EXL2.
  * **VLLM**: Asynchronous batch decoding with VLLM. (Experiment support)
  * **llama.cpp Async Server Endpoint**: Connects to a continuously-batched llama.cpp server for async inference.

* **Single-Stream Decoding**

  * **llama.cpp Server Endpoint**: single-stream decode endpoint for llama.cpp server.

* **OuteTTS 1.0 0.6B Model Support**
  Compatibility with the new [OuteTTS-1.0-0.6B](https://huggingface.co/OuteAI/OuteTTS-1.0-0.6B), including config defaults.

* **Batched Interface Parameters**
  New configuration options to control batched interface.

* Enhanced pre-prompt normalization pipeline.

* Documentation Updates, expanded the batched interface usage.