v1.6.0

DTMF dialer

Synthesize telephone keypad tones from paired row and column frequencies.

npx web-audio-api dtmf 5551234
digits=<sequence>
digits to dial; supports 0–9, *, #, and A–D
speed=<time>
length of each tone and following gap
ready

Other examples

05Reference tonePlay a reference pitch with selectable waveform and frequency.Create 07NoiseGenerate white, pink, brown, blue, or violet noise.Create 06SweepSweep across a frequency range with linear or exponential automation.Measure 08ImpulseFire a one-sample impulse for response and signal-path testing.Measure

This is a DTMF tone generator, the touch-tone dialer sound behind telephone keypads: it synthesizes the paired row and column frequencies for any digit sequence. Dial it in the browser, or render the same DTMF audio from the Node CLI.