ComplexRes

Extension

Description

A resonating filter which can be modulated in its resonating frequency at audio rate without blowing up. Implements the filter structure found in

Julian Parker and Till Bovermann (2013): Dynamic FM synthesis using a network of complex resonator filters

Developed as part of the DEIND project.

Class Methods

.ar

Examples

{ComplexRes.ar(Pulse.ar(0.1,0.001,0.1),50+ 5000*SinOsc.ar(50),0.5)}.play;

Feed forward network (core part): http://sccode.org/1-4V6// FM network dst = freqs.inject([filterIn, 0], {|in, freq, i| tmpIter = ComplexRes.ar( filterIn, freq + (fms[i] * in[0]), decays[i] ); [ tmpIter * amps[i], in[1] + tmpIter ] }); dst = Mix.ar(dst * [1, amps.sum * numNodes.reciprocal]);

Recursive network (core part): http://sccode.org/1-4V7feedbacks = LocalIn.ar(numOscs); filterIn = preAmp * in; oscs = freqs.inject([], {|oscArray, freq, i| tmpOsc = ComplexRes.ar(filterIn, freq + oscArray.inject(0, {|sum, osc, j| // modulators from already instantiated oscs sum + (feedbacks[j] * modParams[i][j]) }) + (numOscs - 1 - Array.iota(numOscs - (i))).inject(0, {|sum, g| // modulators from to be instantiated oscs sum + (feedbacks[g] * modParams[i][g]) }), decays[i] ); oscArray ++ tmpOsc; }); // end inject LocalOut.ar(oscs); // feedback is pre-"fader" filterOut = oscs * amps * postAmp;

Full code can be found on http://tai-studio.org/index.php/projects/deind/complexres/ (search for "Full code examples").