FFTSlope Spectral slope

FFTSlope.kr(chain)

Given an FFT chain, this measures the spectral slope, which is the slope of the linear correlation line derived from the spectral magnitudes.

Example

// Very artificial example - just filtering some noise.

s.boot;

b = Buffer.alloc(s,2048,1);

(

x = {

var in, chain, freq, val;

freq = MouseX.kr(20000, 1000, 1);

in = LPF.ar(WhiteNoise.ar, freq);

chain = FFT(b.bufnum, in);

val = FFTSlope.kr(chain);

Out.ar(0, in.dup * 0.1);

(val * 10000).poll(10); // Poll but scaled so more readable!

}.play(s);

)

x.free;