v1.6.0

Metronome

Schedule a click pattern with accents, rests, tempo control, and instrument presets.

npx web-audio-api metronome 120 X-x-X-x-
bpm=<bpm|start..end>
fixed tempo or a linear tempo ramp
-d, --duration <time>
run time (CLI accepts s/m/h suffixes; default: 600s)
pat=<pattern>
X accent, x hit, - or . rest
sound=<preset>
compact classic, wooden pendulum, quartz, woodblock, clave, bell, beep, signal, or karatala
hi=<hz>
classic stick accent resonance
lo=<hz>
classic stick regular resonance
sample=<file>
audio file to use as the click sound instead of a preset
ready

Other examples

02Chromatic tunerEstimate microphone pitch, nearest note, and tuning error in cents.Measure 03Latency testerPlay short clicks through the speakers and time their return through the microphone to measure round-trip latency.Measure 04Level meterShow live microphone RMS and peak level in dBFS, uncalibrated, with fast or slow meter ballistics.Measure

This doubles as an online metronome with sound: set the bpm, an accent pattern like X-x-X-x-, and an instrument voice, then let it click through a practice session. Run it in the browser for a quick bpm click track, or launch the same instrument from the Node CLI to drive a rehearsal, a test, or a batch render.