FFTSubbandFlatness

Extension

Description

Calculates the spectral flatness measure, in the same manner as FFTFlatness, but divides the spectrum into (adjacent, non-overlapping) subbands, so returns separate measures for the different subbands.

The parameter cutfreqs can only be specified on initialisation - they can't be modulated.

Class Methods

.kr

Examples

In this example we take a "flat" sound (white noise) and an "unflat" sound (a sawtooth wave) and mix them together bandwise using [PV_BinWipe]. With the spectrum divided into three bands you should be able to see the results.s.boot; b = Buffer.alloc(s,2048,1); c = Buffer.alloc(s,2048,1); ( x = { var inA, inB, chainA, chainB, chain, vals, cutfreqs; //in = LPF.ar(WhiteNoise.ar, MouseX.kr(10,10000, 1)); inA = WhiteNoise.ar; inB = Saw.ar; chainA = FFT(b.bufnum, inA); chainB = FFT(c.bufnum, inB); chain = PV_BinWipe(chainA, chainB, MouseX.kr(-1, 1)); vals = FFTSubbandPower.kr(chain, [300, 500, 1500]); vals[3].poll(10, "hi "); vals[2].poll(10, "med"); vals[1].poll(10, "low"); Out.ar(0, IFFT(chain).dup * 0.2); }.play(s); ) x.free;