PV_MagSmear average magnitudes across bins


PV_MagSmear(buffer,  bins)


Average a bin's magnitude with its neighbors. 

buffer - fft buffer.

bins - number of bins to average on each side of bin. As this number rises, so will CPU usage.


See also FFT Overview.


s.boot;

(

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

c = Buffer.read(s,"sounds/a11wlk01.wav");

)


(

SynthDef("help-magSmear", { arg out=0, bufnum=0;

var in, chain;

in = LFSaw.ar(500, 0, Decay2.ar(Impulse.ar(2,0,0.2), 0.01, 2));

chain = FFT(bufnum, in);

chain = PV_MagSmear(chain, MouseX.kr(0, 100)); 

Out.ar(out, 0.5 * IFFT(chain).dup);

}).play(s,[\out, 0, \bufnum, b.bufnum]);

)


(

SynthDef("help-magSmear2", { arg out=0, bufnum=0, soundBufnum=2;

var in, chain;

in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);

chain = FFT(bufnum, in);

chain = PV_MagSmear(chain, MouseX.kr(0, 100)); 

Out.ar(out, 0.5 * IFFT(chain).dup);

}).play(s,[\out, 0, \bufnum, b.bufnum, \soundBufnum, c.bufnum]);

)


b.free; c.free;

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