Live spectrum — EML annotated

Microphone in. 2D FFT on top, 3D waterfall below. Pure tones are labelled with their EML representation:sin(2π·440·t) — chain order 1, A4.

Browsers require a tap before they grant microphone access. Whistle a steady note, hum, or play any instrument — the analyzer will snap each detected tone to the nearest equal-tempered pitch.