object PackFFT extends ProductReader[PackFFT] with Serializable
A UGen that writes a complex input signal into an FFT buffer. The input is a sequence of interleaved magnitudes and phases. It is written to an FFT buffer ready for transforming it back into time-domain audio using IFFT.
Examples
// harmonic sound with changing overtone intensities play { // create simple undulating magnitudes val m0 = FSinOsc.kr(Seq.fill(100)(ExpRand(0.1, 1))) * 0.5 + 0.5 // give them a "rolloff" to make the sound less unpleasant val m1 = m0 * Seq.tabulate(100)(_.linLin(0, 99, 1.0, 0.01).squared) // turn the bins on and off at different rates val mags = m1 * LFPulse.kr(Seq.fill(100)(2 pow IRand(-3, 5))) // ignore phase val phases: GE = Seq.fill(100)(0) // We need to create an FFT chain to feed our data in to. // The easiest way is to do an FFT on some signal which we then ignore! val buf = FFT(LocalBuf(512), DC.ar(0)) // now we can do the packing val chain = PackFFT(buf, 512, Zip(mags, phases), 0, 99, 1) val sig = IFFT.ar(chain) Pan2.ar(sig) }
- See also
Linear Supertypes
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