@audio/dtmf
Status calibrated
npm1.0.1licenseMIT
DTMF dial tones — ITU-T Q.23 row/column pairs per digit
DTMF tone pairs (Q.23 frequencies)
import dtmf from '@audio/synth-dtmf'
Dual-tone multi-frequency signaling — one row + one column sine per digit, ITU-T Q.23 frequencies, with inter-digit silence gaps. Symbolic digit-string input — no audio.js manifest (a digit string has no params representation for a host).
dtmf('12*3', { tone: 0.08, gap: 0.04 }) // → Float32Array
| Param | Default | |
|---|---|---|
digits |
— | String of 0-9 A-D * # (positional) |
tone |
0.08 |
Per-digit tone length, seconds |
gap |
0.04 |
Inter-digit silence, seconds |
amp |
0.45 |
Amplitude (each of the two sines) |
fs |
44100 |
Sample rate |
Use when: rendering telephone keypad tones for testing DTMF decoders or IVR-style demos.
Part of @audio/synth — the synth family umbrella.
MIT © audiojs