TL;DR: When Coqui AI shut down, they left XTTS v2 without official training code for the DVAE audio tokenizer and Latent HiFi-GAN vocoder, and fine-tuning new scripts (Arabic, Indic, etc.) broke on fixed vocabularies. I built Open-XTTS-Trainer — an open-source, modular 3-component training suite under MPL-2.0 with verified GPU loss convergence on real human speech and a 1-click Colab demo.

Why I Built This

XTTS v2 is one of the best local zero-shot TTS models we have, but training/adapting it has been painful since Coqui closed:

Missing Component Recipes: Only GPT fine-tuning was commonly available. Stage 1 (DVAE) and Stage 3 (HiFi-GAN vocoder) training pipelines were either unreleased or fragmented.

The Tokenizer Wall: XTTS was hardcoded for 17 languages.…