This is a noise generator and UI based on noise.js.

I used to use simplynoise a lot but got annoyed with the Flash requirement, overdone UI and memory leaks, so I forked zacharydenton's noise library, refactored it a bit, and made my own.

noiseMaker.js

noiseMaker.js uses the convenient noise production nodes added to AudioContext by noise.js to produce soothing background noise with volume control and an oscillation option that replicates the features of the simplynoise UI in pure JS - as long as your browser supports it.

//create a noiseMaker instance
var noiseMaker = new NoiseMaker();

//constants
noiseMaker.colors; //key/value pairs of supported colors that you can call start with

//get/setters
noiseMaker.volume = 10 //ouput volume: 0 to 100
noiseMaker.period = 0 //oscillatior frequency denominator: 1/(n > 0)Hz; 0 = off (seconds between peaks)
noiseMaker.magnitude = 60 //oscillation magnitude: 0 to 100

//methods
noiseMaker.start([color || 'brown', bufferSize (passed to noise.js methods]);
noiseMaker.stop();

//any invalid input should be silently ignored

noise.js

noise.js is a library that provides noise generators for the Web Audio API. Currently, noise.js provides generators for white noise, pink noise, and brown noise.

Here's a demo of both noise modulating oscillators and oscillators modulating noise.

Usage Examples

White Noise

Create a white noise generator and route it to the output:

var context = new webkitAudioContext();
var whiteNoise = context.createWhiteNoise();
whiteNoise.connect(context.destination);

Pink Noise

Create a pink noise generator and route it to the output:

var context = new webkitAudioContext();
var pinkNoise = context.createPinkNoise();
pinkNoise.connect(context.destination);

Modulate a sawtooth oscillator with filtered pink noise:

var context = new webkitAudioContext();
var pinkNoise = context.createPinkNoise();
var pinkGain = context.createGainNode();
var pinkFilter = context.createBiquadFilter();
pinkGain.gain.value = 100;
pinkFilter.frequency.value = 1.618;
pinkNoise.connect(pinkFilter);
pinkFilter.connect(pinkGain);

var saw = context.createOscillator();
saw.type = saw.SAWTOOTH;
saw.frequency.value = 440.0;
var sawGain = context.createGainNode();
sawGain.gain.value = 0.3;

saw.start(0);
saw.connect(sawGain);
pinkGain.connect(saw.frequency);
sawGain.connect(context.destination);

Brown Noise

Create a brown noise generator and route it to the output:

var context = new webkitAudioContext();
var brownNoise = context.createBrownNoise();
brownNoise.connect(context.destination);

Modulate the brown noise amplitude to simulate the sound of the ocean: