Perlines v2: browser audio visualizer (WebAudio + WebGL2) #1
2026-11-06
web: band-split dB-flux onset detector, synthetic drum bench
Replaces the log1p-compressed whole-spectrum flux with four-band flux in dB, a two-frame max-filtered reference, a per-band median+8 MAD threshold with a per-band minimum rise, and one refractory period. Level-independent. tools/onset-bench.mjs synthesises kick/snare/hat patterns with known onset times (3 patterns x 3 tempos x 3 levels x 3 beds = 81 signals), scores hit rate, false positives and median timing at 30 fps and 512-sample hops. tools/onset-legacy.mjs freezes the old detector for the before numbers. Synthetic only. Nothing was listened to; no real music, no real GPU. Corpus adjustments made after the first baseline run: coincident kick+snare count as one onset; voices end in a 60 ms fade because truncation clicks read as onsets in the near-silent gaps; hats raised relative to the snare tail. Baseline was rerun after each change. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-11-05
README front door: point at web/ v2, state unwatched status
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
web: bench fixes (done flag, readback sync), runner kills browser on failure, BENCH.md
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
web: per-band onset flux, scene intensity tuning from headless captures
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
web: README, headless CDP runner, dev server fix
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
web: WebGL2 scenes, audio inputs, analysis state, page
Aurora disk (spectrum-to-mesh extrusion), burning-water spray (stateless onset-driven particles), vector trails (Perlin curl paths). File, mic and synthetic demo inputs; frame-time HUD and ?bench mode. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
web: onset detector and key estimator with synthetic-signal tests
Spectral-flux onset detector (max-filtered reference, median threshold, refractory) and peak-based chroma with Krumhansl profile key estimate. Own FFT; no external dependencies. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>