pjsaudio

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                              PJSAudio

PJSAudio is a comprehensive audio library for javascript/processing.js. PJSAudio includes many functions for signal analysis and generation.

Modules:

DFT(bufferSize, sampleRate): Discrete Fourier Transform

Usage: 

var dft = new DFT(1024, 44100);
dft.forward(signal);
var spectrum = dft.spectrum;

FFT(bufferSize, sampleRate): Fast Fourier Transform

Usage:

var fft = new FFT(2048, 44100);
fft.forward(signal);
var spectrum = fft.spectrum;

Oscillator(waveform, frequency, amplitude, bufferSize, sampleRate): Signal Generator * Sine wave * Square wave * Saw wave * Triangle wave

Usage:

var osc = new Oscillator(SINEWAVE, 440, 1, 2048, 22050);
osc.generate();
var signal = osc.signal;

ADSR(attack, decay, sustainLevel, sustain, release, sampleRate): Attack-Decay-Sustain-Release Envelope

Usage:

var envelope = new ADSR(0.01, 0.1, 0.5, 0.1, 0.2, 44100);
envelope.process(signal);

IIRFilter(filter, cutoff, sampleRate): Infinite Impulse Response Filters * Low Pass Filter * High Pass Filter

Usage:

var filter = IIRFilter(LOWPASS, 200, 44100);
filter.process(signal);

BeatDetektor (by Charles J. Cliffe): BPM detector

@corban weare.buildingsky.net

   Copyright (c) 2010 Corban Brook, released under the LGPL license