dtmf-generation-stream

Overview

This is a simple nodejs module that implements a readable stream that generates DTMF tones.

You can specify digits to be generated as a simple string like '1234' or use SSML like this:
``
12341234
`

Installation


`
npm i dtmf-generation-stream
`

Sample Usage

`
const DtmfGenerationStream = require('dtmf-generation-stream')
const Speaker = require('speaker')

const format = {
sampleRate: 8000,
bitDepth: 16,
channels: 1
}

const dgs = new DtmfGenerationStream({format})

const s = new Speaker(format)

var digits = '11112222'
console.log(Enqueueing: ${digits})
dgs.enqueue(digits)

var ssml = '12341234'
console.log(Enqueueing: ${ssml})
dgs.enqueue(ssml)

dgs.pipe(s)

dgs.on('empty', () => {
var ssml = 'abcd'
console.log(Empty. Enqueueing: ${ssml})
dgs.enqueue(ssml)
})
``

More Examples

See here.

Events

The stream emits event 'empty' indicating when there are no more digits in the queue to be played.