v1.6.0

Missing fundamental

Play harmonics 2–6 while omitting the pitch the listener still perceives.

npx web-audio-api missing-fundamental 100 3s
freq=<hz|note>
frequency or note name in the CLI (default: 100)
fund=<on|off>
include the fundamental for comparison
-d, --duration <time>
run time (CLI accepts s/m/h suffixes; default: 3s)
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 15BeatingHear amplitude beating produced by two nearby frequencies.Explore

This demonstrates the missing fundamental illusion, also called virtual pitch: it plays only the upper harmonics of a tone and omits the fundamental, and the ear still reconstructs the implied pitch. Listen in the browser, or render the harmonic complex from the Node CLI to inspect it in an editor or an FFT.