v1.6.0

Beating

Hear amplitude beating produced by two nearby frequencies.

npx web-audio-api beating 440 3 5s
freq=<hz|note>
frequency or note name in the CLI (default: 440)
diff=<hz>
difference and beat frequency
-d, --duration <time>
run time (CLI accepts s/m/h suffixes; default: 30s)
ready

Other examples

11Shepard toneLayer octave-spaced voices to create a pitch that appears to rise or fall forever.Explore 12Risset rhythmLayer tempo cycles to create a beat that appears to accelerate or decelerate forever.Explore 13Binaural beatsSend nearby frequencies to opposite ears and hear their difference.Explore 14Missing fundamentalPlay harmonics 2–6 while omitting the pitch the listener still perceives.Explore

This is an acoustic beating demo: two nearby frequencies played together produce an audible beat, a slow pulsing at the rate of their difference. Try it in the browser to hear the beat frequency directly, or generate the same two-oscillator signal from the Node CLI.