generate DTMF tones like a touchtone phone

Using baudio, we can make a tone script that runs on the server.

var tone = require('touchtone')();
tone.dial('18005551212');

var baudio = require('baudio');
baudio(tone.play()).play();

Make sure you have sox installed to use baudio.

We can play tones in the browser using webaudio:

var tone = require('touchtone')();
var baudio = require('webaudio');

var form = document.querySelector('form');
form.addEventListener('submit', function (ev) {
    ev.preventDefault();
    var number = form.elements.number.value;
    tone.dial(number);
});

baudio(tone.play()).play();

There is also a touchtone command that ships with this package.

USAGE

  touchtone {OPTIONS} NUMBER

INFO

  Play the DTMF tones for NUMBER on the system audio device.

OPTIONS

  -d --duration  Time in seconds to play each tone.

  -p --pause     Time in seconds to pause between tones.

  -v --volume    Volume: higher than 1: louder, lower than 1: softer.

  -h --help      Show this message.

EXAMPLE
  
  touchtone 18005551212
  touchtone '*69'

var touchtone = require('touchtone')

Create a new tone instance with opts:

• opts.duration - time in seconds to play each tone
• opts.pause - time in seconds between each tone
• opts.volume - higher than 1: louder, lower than 1: quieter

Generate a single tone for a string character key.

Generate a sequence of numbers from a string number.

Return a function (t) {} that itself returns an amplitude between -1 and 1, inclusive. This function can be fed into baudio or webaudio to generate sounds.

When the queued-up tones are finished playing, this event fires.

All 16 DTMF keys are supported:

 HZ  1209 1336 1477 1633
697    1    2    3    A
770    4    5    6    B
852    7    8    9    C
941    *    0    #    D

Refer to each key by its symbol name as a string.

First install sox unless you only want to use this module in a browser.

If you want the command-line client, do:

npm install -g touchtone

If you want the library, do:

npm install touchtone

MIT