keywordGate is an interface so the decision that ships an utterance can be
exercised with a fake that fires on demand. A gate that can only be tested
with a model file is a gate nobody tests.
The three that carry the fixed-when criterion: keywordless speech never
reaches STT, the keyword does, and barge-in still cuts her off mid-sentence.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
Until now every utterance near the microphone became a turn. SurfaceVoice caps
acts at L0, which made that safe rather than expensive, but L0 does not cap
reading: the room could still hear his facts read back.
The gate sits at dispatch, not at the VAD. The keyword opens a window, the VAD
closes the utterance when he stops, and dispatch asks whether the window was
open. That ordering is what lets him say "Мэйвен" and then a sentence: the
window has to outlive the word by the length of what follows it.
One keyword buys one turn. A window that renewed itself on every reply would
leave the microphone open for as long as he kept talking, which is the state
this exists to end.
Her own voice cannot wake her. Every path above the gate returns while the
player is running, so no frame of her reply is ever scored, and the streaming
state is cleared when playback ends.
Nil is a working value. Without -wake-model the gate is open and this is
yesterday's mavwaked, which is what an operator with a missing file should get
rather than a daemon that refuses to listen.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
melContext is 480 because melspectrogram.onnx returns N/160-3 frames and frame
i covers [i*160, i*160+400). With 480 samples of history the buffer is 8
frames and the oldest continues exactly one hop after the previous call's
newest. Less history leaves a gap.
Feed reports the threshold CROSSING, not the state. A keyword held above the
threshold for a second is one wake, and firing on every chunk of it would make
the gate look open when it is merely slow to fall.
Nil is the CLOSED gate rather than the open one. A nil that answers "yes,
keyword" reads as a working wake word in every log line it produces.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
The two feature models are frozen and pretrained; only the 100KB head was
trained here. The shapes were measured rather than assumed: 2.0s of 16kHz
audio gives 197 mel frames, and 76-frame windows at stride 8 give exactly the
16 embeddings the head was fitted on.
This file knows tensors and nothing about the 80ms cadence, which is why the
scaling openWakeWord applies between the two feature models lives here.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
claude