Node.js wrapper around PortAudio.
This library is a (lot more messy) fork of naudiodon (itself a fork of node-portaudio), with the following modifications:
- Changing the stream model to a pull model with double buffering, this change intends to provide a more responsive environment and a better clock stability for real-time usages;
- Updating from Nan to N-API API.
Unless you really need this features (aka most of the time) please use naudiodon or similar stream-based library
warning: not on npm yet, install from github:
npm install [--save] b-ma/node-portaudio
const portaudio = require('node-portaudio');
// retrieve the list of devices
console.log(portaudio.getDevices());
// do some synthesis
const frequency = 400;
const sampleRate = 44100;
let phase = 0;
function sine(output, frameSize, channelCount) {
for (let i = 0; i < frameSize; i++) {
output[i] = Math.sin(phase * Math.PI * 2);
phase = (phase + frequency / sampleRate) % 1;
}
}
portaudio.output.configure({
sampleRate: sampleRate,
channelCount: 1,
process: (output, framesPerBuffer, channelCount) => {
sine(output, framesPerBuffer, channelCount);
}
});
// start audio rendering
portaudio.output.start();
// stop audio rendering
setTimeout(() => portaudio.output.stop(), 3000);- figure out what happens with stereo output
- implement non interleaved mode
- implement input
BSD-3-Clause