cb320557e6
Whole-track analysis into a frame-indexed FeatureTrack. Nothing reads a live AnalyserNode: realtime preview maps currentTime to a frame index, export counts frames, both read the same rows. - fft.js: radix-2 with precomputed tables, allocated once per track - analyze.js: STFT at hop 1/60s with CENTRED windows (a window that starts at the timestamp reports energy arriving up to 23ms later, which reads as visuals lagging the music). Energy features normalised against the track's own percentiles; absolute stats kept in summary for the look generator. - tempo.js: autocorrelation + grid F-measure, beat grid, downbeats - segment.js: self-similarity novelty, boundaries snapped to the bar grid - FeatureTrack: assembles everything, plus the lookahead fields. buildSlope rises through the bars leading into a higher-energy section, so a build can ramp into the drop rather than react after it lands. - clicktrack.js: mixes clicks onto the detected grid for validation by ear Three real bugs found and fixed by the tests: - 174 BPM read as 87. Mean-energy-per-beat scores a half-tempo grid identically to the true one; only an F-measure penalises the missed onsets via recall. - 90 BPM read as 180. Offbeat hi-hats make a double-tempo grid score perfectly on both precision and recall, so the grid is now interpreted metrically afterwards: a systematic strong/weak alternation means the real beat is every other grid point. - Beat grid drifted ~30ms over 30s from integer-frame offsets. Onset peaks are now parabolically interpolated and the grid least-squares fitted. Gates: 11/11 node tests against synthetic ground truth (tempo within 2% across 90-174 BPM, beat alignment under half a frame, segmentation within 2s of a known boundary, graceful on silence, 6-minute analysis in 1.0s); 5/5 browser checks including audio-driven vs fixed-step frame parity. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> |
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| .claude | ||
| flow-state | ||
| magic-mirror | ||
| party-cathedral | ||
| party-stage | ||
| sparkles | ||
| tv-player | ||
| README.md | ||
Music Video Generator
After I'm done producing a music track, I still need to create a music video for it. Otherwise, I can't upload it to a video sharing site.
This is a library of music video "generators", anything that can be recorded along with a music file to produce a music video. Usually, this means a dynamic HTML page with some kind of dynamic visuals.