FFTTrigger Outputs the necessary signal for FFT chains, without doing an FFT on a signal

FFTrigger(buffer, hop, polar)

buffer - a buffer to condition for FFT use

hop - the hop size for timing triggers (defaults to 0.5)

polar - a flag. If 0.0, the buffer will be prepared for complex data, if > 0.0, polar data is set up.

(

s.boot.doWhenBooted{

b = Buffer.alloc(s, 512);

};

)

// Reminder: This isn't the intended typical usage! It's OK to do this though.

(

x = {

var mags, phases, chain, sig;

// Create simple undulating magnitudes

mags = {FSinOsc.kr(ExpRand(0.1, 1)).range(0, 1)}.dup(100);

// Then give them a "rolloff" to make the sound less unpleasant

mags = mags  * ((1, 0.99 .. 0.01).squared);

// Let's turn the bins on and off at different rates, I'm *sure* that'll sound interesting

mags = mags * {LFPulse.kr(2 ** IRand(-3, 5)).range(0, 1)}.dup(100);

// Let's ignore phase for now

phases = 0.dup(100);

chain = FFTTrigger(b, 0.5);

// Now we can do the packing

chain = PackFFT(chain, 512, [mags, phases].flop.flatten, 0, 99, 1);

sig = IFFT(chain);

Out.ar(0, sig.dup);

}.play(s);

)

x.free;

b.free;