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DSP.js 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, Delays, Reverb. 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); MultiDelay(maxDelayInSamplesSize, delayInSamples, masterVolume, delayVolume): Delay which feeds back its own delayed signal Usage: var delay = MultiDelay(44100*5, 44100*1, 1.0, 0.6); delay.process(signal); Reverb(maxDelayInSamplesSize, delayInSamples, masterVolume, mixVolume, delayVolume, dampFrequency): Reverb Usage: var reverb = Reverb(20000, 6500, 0.8, 0.5, 0.9, 4500); reverb.process(signal); @corban weare.buildingsky.net ________________________________________________________________________________ Copyright (c) 2010 Corban Brook, released under the MIT license
Digital Signal Processing for Javascript
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