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HVC intro notes before each motif; retrain - #18
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E fired at ~5 Hz through the first 60 ms of every motif (2.5 Hz later) because the HVC-driven inhibition only switches on at motif onset; a silent burn-in does not help. Two 80 ms introductory notes of HVC activity, no sound, 20 ms gaps (HVC_INTRO = (2, 80, 20)), now precede each motif in training, evaluation and the figures, passed to fit/transform as hvc_prelude so the returned spikes and every index stay motif-aligned. - Onset bump 4.96 -> 3.61 Hz (peak 11.9 -> 7.1 Hz); every DAF metric and the cancellation ratio are within their 10-seed noise. - The model's stimulus record carries hvc_intro; a model that records its stimuli but not intro notes is evaluated without them. - sven-train-ven / sven-evaluate / sven-figure: --hvc-intro NOTES MS GAP. - Retrained (pure-defaults run reproduces it byte-for-byte); slow-test pins and 3-SD tolerances, README table, MODEL.md and design notes updated. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Removes most of the start-of-motif transient.
Cause. E fired at ~5 Hz through the first 60 ms of every motif, against 2.5 Hz later, because the HVC-driven inhibition only switches on at motif onset: I fires at ~17 Hz in the first 30 ms vs 33 Hz later. A silent burn-in doesn't help, and the bump appears with HVC alone and no sound.
Change.
HVC_INTRO = (2, 80, 20)), precede each motif in training, evaluation and the figures.fit/transformashvc_prelude, so the returned spikes and every index stay aligned to the motif, and the figures show only the motif.--hvc-intro NOTES MS GAPonsven-train-ven,sven-evaluateandsven-figure. A model that records its stimuli but no intro notes is evaluated without them.Effect (retrained, 10 seeds):
Artifacts. Retrained
ven_model.npz, and a pure-defaults run reproduces it byte-for-byte;MANIFEST.sha256updated. The slow-test pins and 3-SD tolerances, the README table,MODEL.mdand the design notes are updated. 206 tests pass; ruff clean.finchsim. Its AIV pipeline builds its own HVC stub without intro notes, and is still pinned to the old model and commit, so it's unaffected until it next upgrades.
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