54 lines
1 KiB
Text
54 lines
1 KiB
Text
|
class:: PV_LocalMax
|
||
|
|
summary:: Pass bins which are a local maximum.
|
||
|
|
related:: Classes/FFT, Classes/IFFT, Classes/PV_MagAbove, Classes/PV_MagBelow, Classes/PV_MagClip
|
||
|
|
categories:: UGens>FFT
|
||
|
|
|
||
|
|
Description::
|
||
|
|
|
||
|
|
Passes only bins whose magnitude is above a threshold and above their nearest neighbors.
|
||
|
|
|
||
|
|
|
||
|
|
classmethods::
|
||
|
|
|
||
|
|
method::new
|
||
|
|
|
||
|
|
argument::buffer
|
||
|
|
|
||
|
|
FFT buffer.
|
||
|
|
|
||
|
|
|
||
|
|
argument::threshold
|
||
|
|
|
||
|
|
Magnitude threshold.
|
||
|
|
|
||
|
|
|
||
|
|
Examples::
|
||
|
|
|
||
|
|
code::
|
||
|
|
s.boot;
|
||
|
|
b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");
|
||
|
|
|
||
|
|
|
||
|
|
(
|
||
|
|
SynthDef("help-localMax", { arg out=0;
|
||
|
|
var in, chain;
|
||
|
|
in = Mix.arFill(3, { LFSaw.ar(exprand(100, 500), 0, 0.1); });
|
||
|
|
chain = FFT(LocalBuf(2048), in);
|
||
|
|
chain = PV_LocalMax(chain, MouseX.kr(0, 50));
|
||
|
|
Out.ar(out, 0.5 * IFFT(chain).dup);
|
||
|
|
}).play(s);
|
||
|
|
)
|
||
|
|
|
||
|
|
(
|
||
|
|
SynthDef("help-localMax2", { arg out=0, soundBufnum=2;
|
||
|
|
var in, chain;
|
||
|
|
in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1);
|
||
|
|
chain = FFT(LocalBuf(2048), in);
|
||
|
|
chain = PV_LocalMax(chain, MouseX.kr(0, 100));
|
||
|
|
Out.ar(out, 0.1 * IFFT(chain).dup);
|
||
|
|
}).play(s, [\soundBufnum, b]);
|
||
|
|
)
|
||
|
|
|
||
|
|
::
|
||
|
|
|