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Hans 9ae73e68f5 mtmd : add Soprano TTS support (#28607 ) Add Soprano-80M and Soprano-1.1-80M (https://huggingface.co/ekwek/Soprano-1.1-80M) as an audio generation model: a Qwen3 backbone plus a Vocos decoder that runs as a gen-only mmproj. - convert: detect Soprano checkpoints and export the backbone as qwen3 and the decoder.pth Vocos weights as the mmproj - vocab: add the soprano pre-tokenizer (lowercase, whitespace collapse, per-digit split, [UNK] fallback) - mtmd: add the Vocos graph and ISTFT, allow loading a gen-only mmproj for Soprano and include the gen-audio context in mtmd_get_memory_usage - mtmd-helper: add the Soprano pipeline; the decoder runs over the whole utterance, so stream mode sends the audio in one chunk after flush() - tts: document Soprano usage Assisted-by: Codex Assisted-by: Claude Opus 5.5		2026-10-24 01:09:50 +02:00
..
CMakeLists.txt	mtmd: support Qwen3-TTS (note: breaking change to llama-tts binary) (#26254 )	2026-08-04 17:26:15 +02:00
README.md	mtmd : add Soprano TTS support (#28607 )	2026-10-24 01:09:50 +02:00
tts.cpp	server : add POST /tts endpoint for TTS models (#26603 )	2026-10-21 01:19:42 +02:00

README.md

llama.cpp TTS

This is a tool to demonstrate audio generation capability in llama.cpp via libmtmd. It was added via PR #26254

Note: this tool used to serve as a demo for OuteTTS, but it was converted to a more model-agnostic tool.

Common usage

Simple usage:

llama-tts -hf ggml-org/Qwen3-TTS-12Hz-1.7B-Base-GGUF -p "Hello world" --output out.wav

Note: it's highly recommended to always provide a speaker reference voice (via --tts-speaker-file); otherwise, the model's performance may be degraded.

Common params:

Sampling params such as --top-k, --top-p, --temp, etc.
-n <number_of_frames> limits the output length, e.g. -n 500. Note that how many milliseconds each frame represents varies by model
Core inference params such as -ngl, -b, -ub, etc.

Qwen3-TTS

Available params:

--tts-lang can be zh, en, de, it, pt, es, ja, ko, fr, ru (default: en)
--tts-speaker-file should point to a speaker reference audio file (wav, mp3)

Example usage:

llama-tts -hf ggml-org/Qwen3-TTS-12Hz-1.7B-Base-GGUF \
    -p "Hello world" \
    --tts-lang english \
    --tts-speaker-file speaker.mp3 \
    --output out.wav

Pocket TTS

Available params:

--tts-speaker-file should point to a speaker reference audio file (wav, mp3). It is required, the model produces almost no audio without it
Note: lang is not used, the language is a property of the weights

Example usage:

llama-tts -m pocket-tts.gguf \
    -mm mmproj-pocket-tts.gguf \
    -p "Hello world" \
    --tts-speaker-file speaker.mp3 \
    --output out.wav

Note for GGUF conversion:

The upstream repository holds one complete model per language under languages/, next to a set of shared files at the root. Convert one of the languages/<name> directories, not the root directory:

python convert_hf_to_gguf.py path/to/pocket-tts/languages/english --outfile pocket-tts.gguf
python convert_hf_to_gguf.py path/to/pocket-tts/languages/english --mmproj --outfile mmproj-pocket-tts.gguf

Soprano

Available params:

--tts-speaker-file is not supported; the model uses a fixed voice
Note: lang is not used. Supply normalized English text

Example usage:

llama-tts -m soprano.gguf \
    -mm mmproj-soprano.gguf \
    -p "Hello world" \
    --temp 0 \
    --output out.wav

Note for GGUF conversion:

Both Soprano-80M and Soprano-1.1-80M are supported. Convert both files from the same model directory, including decoder.pth:

python convert_hf_to_gguf.py path/to/Soprano-1.1-80M --outtype f32 --outfile soprano.gguf
python convert_hf_to_gguf.py path/to/Soprano-1.1-80M --mmproj --outtype f16 --outfile mmproj-soprano.gguf