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chatterbox
Chatterbox, Resemble AI's first production-grade open source TTS model. Supports zero-shot voice cloning from a reference WAV, including saved LocalAI Voice Library profiles. Licensed under MIT, Chatterbox has been benchmarked against leading closed-source systems like ElevenLabs, and is consistently preferred in side-by-side evaluations.

Repository: localaiLicense: mit

chatterbox-tts-crispasr
Chatterbox (ResembleAI, MIT) text-to-speech synthesized through the CrispASR backend. Two-GGUF runtime: a Llama T3 token model plus an S3Gen codec companion (tokens to 24 kHz waveform). Auto-detected by CrispASR and ships with a built-in default voice; runs end-to-end on CPU and produces 24 kHz mono audio. Default GGUF sizes ~630 MB (T3) + ~358 MB (S3Gen).

Repository: localai

audio-cpp-chatterbox
Chatterbox (audio.cpp, Q8_0) - multilingual zero-shot voice cloning, served by the audio-cpp backend. A reference clip is REQUIRED. This build advertises only the cloning and voice-conversion tasks, not plain TTS, so every request must set the TTS voice field to the path of a WAV file on the server; a voice that is not a file on disk is treated as a named preset and the request is refused with a message saying so. The voice-conversion half is reached through /audio/transform rather than /v1/audio/speech: post the speech to convert as `audio` and the target speaker's clip as `reference`. That is why this entry declares audio_transform alongside tts. With both this and a source-separation model installed, /audio/transform has two candidates, so name the model explicitly rather than relying on the default pick. Q8_0 rather than 16-bit because upstream's tested-status table records the same result for both (Pass, ASR match with drift) and this build is half the size.

Repository: localaiLicense: mit