AudioLevel

Live amplitude readout, returned by `voice.level()` and `bus.meter()` . Values are linear (0..1). Convert to dB with `20 * log10(value)` . - `rms` — root-mean-square over the most recent ~10 ms window. Smooth, matches what a VU meter shows. - `peak` — maximum absolute sample in the same window. Fast-moving, matches what a peak meter / clip indicator shows. Both numbers come from a single AnalyserNode read; calling `level()` more than ~60 Hz is wasted work because the underlying time-domain buffer doesn't refresh faster than the audio thread fills it.