q-pocket-tts — Pocket TTS as a κ-object (real-time voice, in your browser, no server)

TTS by Kyutai. A 100M-parameter CPU text-to-speech model, re-hosted as a content-addressed κ-object for the Hologram serverless substrate so the Bonsai demo can speak its answers as it writes them — 100% in the browser, on the CPU, leaving the GPU to the mind.

This is the int8 ONNX decode graph (community export by KevinAHM) plus one voice (alba, Kyutai's default), run with onnxruntime-web 1.20.0 (WASM/SIMD). No account, no data leaves the device; warm after one visit.

What's here

Each file is gzipped and stored as a content-addressed block b/sha256_<hex>.gz; the manifest lists them. Every block is verified against its content address before it is decompressed (Law L5).

role	file	what it is
flow_lm_main	flow_lm_main_int8.onnx	the streaming flow-LM backbone (autoregressive latents)
flow_lm_flow	flow_lm_flow_int8.onnx	the stateless flow-matching step
text_conditioner	text_conditioner_int8.onnx	text → conditioning embeddings
mimi_decoder	mimi_decoder_int8.onnx	Mimi codec decoder → 24 kHz PCM
tokenizer	tokenizer.model	SentencePiece tokenizer
bos_before_voice	bos_before_voice.npy	BOS conditioning prefix
bundle	bundle.json	runtime metadata (state manifests, sample rate)
voice	voice.alba.bin	ONE voice state (PTVB1, single voice) — extracted from the 8-voice voices.bin

manifest.json (sha256 transport axis) + manifest.blake3.json + sha256-to-blake3.map.json (canonical BLAKE3 κ axis). Any static host can serve this — the bytes carry identity, not the host.

Pins

• manifest κ (pin): did:holo:sha256:fb8d982d3a37f845915358928f985b83339dd198b45b6f6a705bdc8145b1afd7
• root κ (over the sorted block set): sha256:a4c11cfbef09c5b30dc97733c11ec21e2573c3adc467fcf4409c06b44d6f41d4
• voice: alba · language english_2026-04 · 24 kHz · latent dim 32

Payload

131.7 MB raw → 75.7 MB stored (gzip), 8 blocks. Decode graph only — the voice-cloning encoder is omitted (a non-goal). One voice ships; swapping the voice is a one-file re-mint.

Measured (browser, 2026-07-16)

Chrome / WASM-SIMD, 24-core desktop: first sound 332 ms on a short clause single-threaded (1.07× realtime); 313 ms and 1.39× with threads (cross-origin isolation). Real speech, 24 kHz. Running concurrently with Bonsai-8B on WebGPU costs ~20% of decode throughput (CPU-orchestration, not GPU contention) — still real-time.

Provenance

• Model + voices: Kyutai Pocket TTS — kyutai/pocket-tts (weights CC-BY-4.0), voices from kyutai/tts-voices.
• ONNX export: KevinAHM/pocket-tts-onnx (export scripts Apache-2.0); upstream Pocket TTS code is MIT.
• Runtime worker: adapted from the KevinAHM/pocket-tts-web demo space.
• κ-mint: holo-bonsai/mint-pocket-tts.mjs (gzip each opaque blob → sha256(gz) = block address; root = sha256 over the sorted name:kappa set) + forge/gen-blake3-manifest.mjs (BLAKE3 axis). No tensor re-layout — the ONNX graphs pass through byte-exact.

See LICENSE (CC-BY-4.0) and NOTICE.txt.