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annotate dictation/README.md @ 278:8d560f50ed4c

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Improve infinite canvas interactions and browser chrome Render Lucide icons directly with Raylib, add searchable icon browsing, robust text editing, entity lifecycle animations, z-order-safe input, semantic themes, and animated editable browser controls. Document rendering, pinning, context, and component extension for future agents. Co-authored-by: Copilot <[email protected]> Copilot-Session: f68442b1-fa8f-46a0-9689-81710613bbd4
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 22:16:14 -0700
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1 # WebRTC dictation
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2
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3 This Bazel package runs a local WebRTC speech-to-text service using aiortc and
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4 faster-whisper. The default multilingual Whisper `small` model uses the RTX
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5 4070 Ti through native WSL CUDA with `int8_float16` compute.
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6
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7 ## Setup
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8
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9 ```bash
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10 bazel run //dictation:preflight
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11 bazel run //dictation:download_model
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12 bazel run //dictation:server
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13 ```
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14
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15 Open <http://127.0.0.1:8090>, grant microphone permission, and start
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16 dictation. Audio is carried by WebRTC and partial/final transcript events are
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17 returned on the `transcripts` RTC data channel.
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18
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19 To transcribe an existing audio file:
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20
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21 ```bash
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22 bazel run //dictation:transcribe -- /path/to/audio.wav
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23 ```
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24
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25 To exercise the running HTTP signaling and WebRTC path with an audio file:
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26
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27 ```bash
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28 bazel run //dictation:webrtc_smoke -- /path/to/audio.wav
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29 ```
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31 The model is stored under `~/.cache/zenbu/faster-whisper-small` by default.
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32 Override it with `DICTATION_MODEL_DIR`.
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33
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34 Useful tuning:
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35
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36 ```bash
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37 DICTATION_COMPUTE_TYPE=int8_float16 \
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38 DICTATION_MAX_SESSIONS=1 \
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39 DICTATION_PARTIAL_INTERVAL_MS=1200 \
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40 DICTATION_SILENCE_MS=700 \
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41 bazel run //dictation:server
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42 ```
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43
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44 The first version intentionally binds to loopback and does not configure STUN
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45 or TURN. Remote WebRTC access requires HTTPS, authentication, origin policy,
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46 and usually a TURN service.