DTMF dialer

Synthesize telephone keypad tones from paired row and column frequencies.

ready

node examples/dtmf.js 5551234
digits=<sequence>
digits to dial; supports 0–9, *, #, and A–D
speed=<time>
length of each tone and following gap
Graph
2 Oscillators → Envelope → Destination
Input
Digits, tone duration
Output
DTMF audio

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.