Kyutai/Pocket TTS English 80M

• License: CC-BY-4.0 (verified in the original repository's public metadata)
• Release date: Not documented for this checkpoint in accessible upstream metadata; repository creation is not a model release date.
• Modalities: Input: text, optional reference audio; Output: audio
• Original model: kyutai/pocket-tts

Description

Pocket TTS is Kyutai's lightweight speech-generation model designed for efficient CPU inference. It turns text into speech and can reproduce a speaker's voice from a reference recording. This checkpoint generates English speech. Description paraphrased from the upstream README.

Run

self serve pocket-tts-en:100m

Here is a link to the API docs: Audio API.

Example Request

With the server running, open another terminal and send a request:

curl http://localhost:8080/v1/audio/speech \
        -H 'Content-Type: application/json' \
        -d '{"input":"Hello from Pocket TTS."}' \
        -o output.wav

The response is saved as output.wav. Without request reference audio, the adapter uses the bundled Alba voice, alba-mackenna/casual.wav.

Engine Parameters

Served by the persistent ggmlc-audio engine through the ggmlc-audio adapter. These are startup settings, not per-request JSON fields; the registry sets no overrides, so the engine defaults apply.

Parameter	Default	What it controls
context_size	4096	Tokens shared by reference audio, text and generated frames; accepts 512 to 262144.
threads	Half the hardware concurrency (at least 1)	CPU workers; accepts 1 to 1024.
gpu_layers	-1	GPU-offloaded layers; -1 means all, 0 means CPU; accepts -1 to 10000. CPU device selection forces zero offload.
temperature	0.8	Token-sampler temperature; accepts 0.01 to 10. This is not a voice style or emotion control.
top_p	0.95	Nucleus sampling; accepts 0 to 1.
top_k	40	Top-k sampling; accepts 1 to 1000 (1 selects greedy token sampling).
frames	512	Maximum generated audio frames per request; accepts 1 to 100000.
seed	Random	RNG seed; accepts 0 to 4294967295. Reproducibility depends on the pipeline and device.

Override startup settings with --set <parameter>=<value>.

Quantizations and Files

Default variant: bf16. This is the only registered variant; sizes and SHA-256 hashes are pinned in the model registry.

bf16 (default)

File	Role	Size	SHA-256	Origin
pocket-tts-en.gguf	model	152.0 MiB (159390816 bytes)	9cca37ab8f3da366a1864919214fbd545f45609d8f1167d1fb302cebea515d63	EryriLabs/pocket-tts-GGUF
mmproj-pocket-tts-en.gguf	mmproj	57.1 MiB (59858080 bytes)	ccb1b6a55a7df0d4f96adff04ae3b9cd99c070edc98f6c84af5adb6d46a64cfc	EryriLabs/pocket-tts-GGUF
alba-mackenna/casual.wav	voice	0.9 MiB (958542 bytes)	46264e83cb99115c3d210260e029117566d9c64f20266d10daa78107759ede3e	kyutai/tts-voices

Total download: 210.0 MiB (220207438 bytes).

Notes

• The serve ID retains 100m, but the registry reports this checkpoint as 80M parameters. Language is fixed by the weights; a reference voice does not change it.
• Pocket TTS needs reference audio; the bundled file supplies it when none is sent. OpenAI voice names such as alloy select that same default, not different speakers.
• To clone another voice, send WAV or MP3 as multipart ref_audio or base64 voice.audio on each request. Use only recordings you have permission to use; observe upstream's consent and prohibited-use terms.
• Output is WAV at 24 kHz. Upstream Python streaming and unlimited-text claims do not describe this adapter's bounded, non-streaming API; see the Audio API for supported request fields and limits.
• The bundled Alba recording is CC-BY-4.0 under the voice repository's licensing notes, separate from the model license.
• Origin links use main because these registry entries pin hashes, not repository revisions. Download size is not the total runtime memory requirement.

Benchmarks

No submitted benchmark reports yet.