Tacit-TTS swaps autoregressive decoding for masked prediction to make zero-shot voice cloning over 10x faster, staying usable with eight cross-lingual references plus infant babble and synthetic gibberish
Tacit-TTS, distilled from IndexTTS2, replaces autoregressive text-to-semantic decoding with masked non-autoregressive generation, adds training-free acoustic length estimation, and accelerates the flow-matching renderer via ReFlow distillation, achieving competitive zero-shot cloning quality on two English and two Mandarin datasets while generating speech over 10x faster than IndexTTS2 for utterances longer than 5 seconds and supporting cross-lingual and non-lexical references without a reference transcript.