Audio Data API JS Library: Difference between revisions

Audio Data API JS Library (view source)

Revision as of 17:27, 1 May 2010

1,430 bytes added , 1 May 2010

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 * extract stuff from bloop, synth, squarewave, etc.
+==DSP.js==
+The current documentation for DSP.js is as follows:
+DSP.js is a comprehensive digital signal processing library for javascript.
+It includes many functions for signal analysis and generation, including
+Oscillators(sine, saw, square, triangle), Window functions (Hann, Hamming, etc),
+Envelopes(ADSR), IIR Filters(lowpass, highpass, bandpass, notch), FFT and DFT transforms.
+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);