PV_SpectralMap : PV_ChainUGen : WidthFirstUGen : UGen : AbstractFunction : Object
Extension
ExtensionMaps the spectral envelope of one FFT process onto another
Source: JoshPV.sc
Description
Acts as a spectral filter.
WARNING: Use of a FFTs with a large window size may cause CPU spikes.
Class Methods
PV_SpectralMap.new(buffer, specBuffer, floor: 0.0, freeze: 0.0, mode: 0.0, norm: 0.0, window: 0.0)
Arguments:
| buffer |
The FFT buffer to filter. |
| specBuffer |
The FFT buffer to derive the spectral curve from. |
| floor |
The spectral curve is a normalized representation of the magnitudes in specBuffer (between 0 and 1). if floor > 0, mags in the spectral curve BELOW this number are also zeroed out. |
| freeze |
If > 0, freeze the current spectral curve. The 'floor' parameter is ignored once the spectral curve is frozen. |
| mode |
If mode == 0, PV_SpectralMap does not have any effect. > 0 acts as a bandpass filter, < 0 a bandreject. |
| norm |
Normalization mode. If <=0, the specBuffer's magnitudes are normalized on a frame by from basis. >0, normalized according to the the sum of the FFT window's sample values. |
| window |
The window used for the FFT - this will effect scaling if norm is > 0. |
Inherited class methods
Instance Methods
Inherited instance methods
4 methods from PV_ChainUGen ► show
2 methods from WidthFirstUGen ► show
159 methods from AbstractFunction ► show
Examples
x
s.boot;z = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");(x = SynthDef(\specMap, {arg sndBuf, freeze = 0; var a, b, chain1, chain2, out; a = LocalBuf.new(2048); b = LocalBuf.new(2048); chain1 = FFT(a, LFSaw.ar(120)); // to be filtered chain2 = FFT(b, PlayBuf.ar(1, z, 1, loop: 1)); // mouse x to play with floor. chain1 = PV_SpectralMap(chain1, chain2, 0.0, freeze, MouseX.kr(-1, 1), 1); out = IFFT(chain1); Out.ar(0, out.dup);}).play(s, [\sndBuf, z, \freeze, 0]))x.set(\freeze, 1)x.set(\freeze, 0);x.free;z.free;helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/JoshUGens/HelpSource/Classes/PV_SpectralMap.schelp
link::Classes/PV_SpectralMap::
link::Classes/PV_SpectralMap::