inspect-robots-voice

Local spoken operator feedback for attended Inspect Robots evaluations. The plugin keeps the microphone open during a run, transcribes accepted utterances locally, and sends them through the same operator-message channel as typed console feedback. Parakeet TDT 0.6B v3 is the default; faster-whisper models remain selectable by model name or local path.

Voice input is feedback-only. Spoken words cannot end a trial or record a verdict. Silence and low-confidence transcription candidates produce no message.

Install

pip install inspect-robots-voice

PortAudio must be available for sounddevice on the machine connected to the microphone: sudo apt install libportaudio2 (Debian and Ubuntu), sudo dnf install portaudio (Fedora), or brew install portaudio (macOS).

Run

inspect-robots run --task my-task --policy agent --embodiment my-robot --voice

Voice mode requires an attended terminal. Repeat -V key=value to configure it:

Key	Default	Backend	Meaning
`model`	`parakeet-tdt-0.6b-v3`	both	Parakeet alias or `nemo-` name, or a faster-whisper model size or local path
`device`	system default	both	sounddevice input index or case-insensitive name substring
`language`	`none`	whisper	explicit transcription language (Whisper uses `en` when unset); Parakeet auto-detects
`compute`	`auto`	whisper	CTranslate2 compute type
`asr_device`	`cpu`	whisper	`cpu`, `cuda`, or `auto`

The default int8 Parakeet weights download once from the Hugging Face hub on first use and use about 640 MB. Pass -V model=small to restore the previous Whisper default. Explicit language, compute, and non-CPU asr_device values require a Whisper model.

Parakeet TDT 0.6B v3 weights are provided by NVIDIA under the CC-BY-4.0 license.

For example:

inspect-robots run --task my-task --policy agent --embodiment my-robot \
    --voice -V model=medium -V device="USB Microphone" -V compute=int8

Filtering

Audio is segmented locally with an adaptive energy gate. Parakeet applies duration, blank-text, coarse mean-token-confidence, and known silence-hallucination checks. Whisper keeps its bundled VAD plus duration, confidence, no-speech, and known silence-hallucination checks. Rejected candidates disappear silently so the policy receives only accepted operator utterances.

Transcription runs in a worker thread. The rollout loop never waits for speech recognition, and a voice pipeline failure disables voice input without disabling typed console feedback.

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