04 / LAB / EXP 001
BPM Lab
A live tempo and spectrum toolkit for DJs, mix engineers, and musicians. Tap tempo from the rolling span of the last 16 taps, with half/double-time and rounding; live BPM detection via spectral-flux onset detection and octave-folded interval clustering, with a confidence meter and one-click re-lock; a 96-bar log RTA (20 Hz–20 kHz) with engineer band regions and decaying peak-hold caps; a lookahead-scheduled metronome that survives hidden-tab throttling; and a delay/LFO calculator with click-to-copy ms values. Analyzes any input — mic, device, or system/tab audio via screen-share capture. No build step, no dependencies; no audio ever leaves the page.