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0.2.1

SparkAudio/Spark-TTS0.2.1Jul 16, 2026by zhu-han

AI Summary

A minor release adding voice cloning persistence, text normalization, and performance fixes for ASR training to improve training speed and model management.

Key Highlights

  • Added `VoiceClonePrompt.save()` and `load()` for cross-session voice reuse.
  • Fixed silent FP32 attention in flex_attention to improve training speed.
  • Added opt-in text normalization for numbers, dates, and currency.
  • Added `asr_device` option to fix ASR model loading on GPU 0.
  • Added `audio.cpp` to community projects.

New Features

  • Cross-session voice reuse for VoiceClonePrompt
  • Text normalization feature
  • ASR device selection option
  • Flex attention autocast fix

Full Release Notes

## What's Changed
* Add audio.cpp to community projects by @0xShug0 in https://github.com/k2-fsa/OmniVoice/pull/209
* Make flex_attention honor autocast (fixes silent fp32 attention, ~4x training slowdown) by @shuaills in https://github.com/k2-fsa/OmniVoice/pull/212
* Honor asr_model_name when the ASR model is loaded lazily by @HenryVarro666 in https://github.com/k2-fsa/OmniVoice/pull/221
* Add VoiceClonePrompt.save()/load() for cross-session voice reuse by @HenryVarro666 in https://github.com/k2-fsa/OmniVoice/pull/223
* Fix ASR model always loading on GPU 0; add asr_device option by @HenryVarro666 in https://github.com/k2-fsa/OmniVoice/pull/224
* Avoid decoding the full reference audio just to get its duration by @aradix85 in https://github.com/k2-fsa/OmniVoice/pull/220
* Add opt-in text normalization (numbers, dates, currency) via generate(normalize_text=True) by @HenryVarro666 in https://github.com/k2-fsa/OmniVoice/pull/227
* Add stale issue workflow by @zhu-han in https://github.com/k2-fsa/OmniVoice/pull/228

## New Contributors
* @0xShug0 made their first contribution in https://github.com/k2-fsa/OmniVoice/pull/209
* @shuaills made their first contribution in https://github.com/k2-fsa/OmniVoice/pull/212
* @HenryVarro666 made their first contribution in https://github.com/k2-fsa/OmniVoice/pull/221
* @aradix85 made their first contribution in https://github.com/k2-fsa/OmniVoice/pull/220

**Full Changelog**: https://github.com/k2-fsa/OmniVoice/compare/0.2.0...0.2.1