shama / baudio

generate audio streams with functions

baudio

generate audio streams with functions

example

var baudio = require('baudio');

var n = 0;
var b = baudio(function (t) {
    var x = Math.sin(t * 262 + Math.sin(n));
    n += Math.sin(t);
    return x;
});
b.play();

methods

var baudio = require('baudio')

var b = baudio(opts, fn)

Return a readable stream of raw audio data based on the channel functions provided. Passing fn is a short-hand for b.push(fn).

The opts.rate is the rate of the output stream in Hz, default 44000.

The opts.size is the size of data chunks to emit, default 1024.

b.push(ix=0, fn)

Push a new track onto the channel at index ix with the function fn(t, i) for the time in seconds t and a counter i.

b.addChannel(type, fn)

Push a new audio channel of type, optionally initializing the channel with a function fn(t, i).

type defaults to 'float' which expects inputs in the range [-1,1] and clips higher and lower values.

type can also be a power of 2 number of bits to use for each sample which expects an integer output value in [0,Math.pow(2,type)-1].

b.play(opts)

Play the audio demo with the play command.

You can also call b.pipe() to handle the output stream yourself.

opts are passed directly through to sox.

b.record(file, opts)

Save the audio stream to file using the sox command.

You can also call b.pipe() to handle the output stream yourself.

opts are passed directly through to sox.

install

With npm do:

npm install baudio

license

MIT