**PV_BrickWall zero bins**

**PV_BrickWall(buffer, wipe)**

Clears bins above or below a cutoff point.

**buffer** - fft buffer.

**wipe** - can range between -1 and +1.

if wipe == 0 then there is no effect.

if wipe > 0 then it acts like a high pass filter, clearing bins from the bottom up.

if wipe < 0 then it acts like a low pass filter, clearing bins from the top down.

See also FFT Overview.

s.boot;

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

(

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

var in, chain;

in = WhiteNoise.ar(0.2);

chain = FFT(bufnum, in);

chain = PV_BrickWall(chain, SinOsc.kr(0.1));

Out.ar(out, IFFT(chain));

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

)

b.free;

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