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@audio/synth-dtmf

v1.0.1

Published

DTMF dial tones — ITU-T Q.23 row/column pairs per digit

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Links

Git

Maintainers

jamenjamendfcreativedfcreativedydy

Keywords

audiodspsynthdtmf

Readme

@audio/synth-dtmf npm MIT

DTMF tone pairs (Q.23 frequencies)

npm install @audio/synth-dtmf
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