Filter Comparisons
Extension
Extensioncompare different resonant low pass filters (BhobUGens)
MoogLadder.ar(in, cutoff, res (0-1), mul, add)
based on code by Victor Lazzarini and Antti Huovilainen
{ |ffreq=390| MoogLadder.ar(Mix(LFSaw.ar([120, 180], 0, 0.33)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.75, mul:3.5).dup }.playRLPFD.ar(in, cutoff, res (0-1), dist (0-1), mul, add)
resonance and distortion are related. can become nasty when cutoff, res, and dist are all high. this is based on code by Josep M Comajuncosas meant to emulate the TB303
x
{ |ffreq=390| RLPFD.ar(Mix(LFSaw.ar([120, 180], 0, 0.33)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.6, 0.0, mul:3.0).dup }.play{ |ffreq=390| MoogVCF.ar(Mix(LFSaw.ar([120, 180], 0, 0.33)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.75, 2.0).dup }.play{BLowPass4.ar(Mix(LFSaw.ar([120, 180], mul:0.2)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.2).dup }.play{BLowPass.ar(Mix(LFSaw.ar([120, 180], mul:0.2)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.2).dup }.play{RLPF.ar(Mix(LFSaw.ar([120, 180], mul:0.2)), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 1500), 0.2).dup }.playNLFiltN.ar(input, a, b, d, c, l, mul, add) (also NLFiltL, NLFiltC)
Implements the filter Y{n} =a Y{n-1} + b Y{n-2} + d Y^2{n-L} + X{n} - C described in Dobson and Fitch with no, linear, or cubic interpolation and sigmoid clipping.
xxxxxxxxxx({ NLFiltC.ar( LFSaw.ar([120, 180], 0, mul:0.1), 0.5, -0.04, 0.8, 0.2, LFCub.kr(0.2, [0, 0.5 * pi], 63, 103) )}.play)Streson.ar(in, delayTime, res) delayTime=stringFundamental.reciprocal, res=0-1 (effects begin around 0.9)
Victor Lazzarini's string resonator.
xxxxxxxxxx{ Streson.ar(LFSaw.ar([220, 180], 0, mul:EnvGen.kr(Env.asr(0.5, 1, 0.02), 1.0) * 0.2), LinExp.kr(LFCub.kr(0.1, 0.5*pi), -1, 1, 280, 377).reciprocal, 0.9, 0.3) }.playhelpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/BhobUGens/HelpSource/Guides/FilterComparisons.schelp
link::Guides/FilterComparisons::
link::Guides/FilterComparisons::