PV_MagLog log of magnitudes

PV_MagLog(buffer)

Converts the magnitudes to their log values. No renormalisation is performed. This is primarily intended for analysis purposes, but can also be used in combination with [PV_MagExp] for vocoder manipulation.

buffer - fft buffer.

s.boot;

(

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

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

)

(

SynthDef("help-maglog", { 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_MagLog(chain);

// No effect; just convert to log and back...

chain = PV_MagExp(chain);

Out.ar(out, 0.3 * IFFT(chain).poll.dup);

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

)