ggml-org/llama.cpp b12061

on GitHub

mtmd: Pocket tts - support for voices without voice cloning (#31429)

• feat: support PocketTTS voices with no voice cloning

The kyutai/pocket-tts-without-voice-cloning weights ship predefined voices as the
backbone KV state after the voice prompt. The converter turns each state back into
the prompt embeddings and stores them in the mmproj (voice.), the zeroed voice
encoder is left out, and the "voice" field of /tts and --tts-voice select one of them.
A speaker reference is rejected when the model has no voice encoder.

Assisted-by: Claude Fable 5.1

• convert : pocket-tts voices never fail the conversion, log the drift of the state

The voice states shipped by Kyutai are not always the ones the pack's
weights give for the prompt: italian, german and spanish match within the
bf16 rounding, english_2026-04 is 2% off and french 20% (its layer 0 state
comes from other weights), while the reference loads them as is and they
still sound like the same voice. The converter now re-prompts the backbone
with the recovered embeddings, compares the whole state and logs the
distance per voice, warning above 5%. A state that does not belong to the
weights at all is skipped, so the packs of kyutai/pocket-tts convert too.

Assisted-by: Claude Fable 5.1

• mtmd : list the predefined voices, expose them in GET /props

mtmd_gen_audio_info gains n_voices and mtmd_gen_audio_voice_name() the
names, with the voices worded as a feature of any audio generation model.
The server lists them under "voices" in /props when the model ships some.

Assisted-by: Claude Fable 5.1

• server : an unknown voice is a bad request

A model with predefined voices answers 400 naming the voice instead of 500
"failed to process TTS prompt". A model without them ignores "voice" with a
warning, as the other audio generation models do.

Assisted-by: Claude Fable 5.1

• refactor api

• fix conversion

• small renaming

• fix lint

• tts : a model with predefined voices speaks with the first one by default

Without a voice prompt such a model only produces near silence. When neither
a voice nor a speaker reference is given, llama-tts and the server now take
the first predefined voice and say so in the log, as the LFM3-Audio template
does with its default voice.

Assisted-by: Claude Fable 5.1

• mtmd : one comment per voice accessor, converter states the rule only

The clip.h comment described clip_gen_get_voice but sat above all three
functions; the converter comment quoted the drift measured per pack, which
goes stale with the next upload of the weights.

Assisted-by: Claude Fable 5.1

• clean up redundant code and comments

• mtmd: match the LFM3-Audio voice name case-insensitively

The tts chat template lowers the voice name, so Male speaks with
the male voice; the voice lookup lowers it the same way and names the
bitmap after the canonical voice.

Co-authored-by: Xuan Son Nguyen son@huggingface.co
Co-authored-by: Pascal admin@serveurperso.com