«example fft sc->processing» by Fredrik Olofsson

on 30 Apr'13 12:04 in processing

template code for sending lots of data (1024 fft values 61 times per second) from sc to processing. sound function from an old sc-tweet. updated to work with sc3.9 and processing 3.3.6

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/*
//--processing code:
import oscP5.*;
import netP5.*;
OscP5 oscP5;

final int BUFFERSIZE= 2048;  //should correspond with fft size in supercollider
final int BUFFERSIZE2= BUFFERSIZE/2; 

float[] fftArray;

void setup() {
  size(1280, 768);
  frameRate(60);
  background(0);
  noSmooth();

  fftArray= new float[BUFFERSIZE2];
  for (int i= 0; i<BUFFERSIZE2; i++) {
    fftArray[i]= 0.0;
  }

  //--network
  OscProperties properties= new OscProperties();
  //properties.setRemoteAddress("127.0.0.1", 57120);  //osc send port (to sc)
  properties.setListeningPort(47120);               //osc receive port (from sc)
  //properties.setSRSP(OscProperties.ON);  //unused
  //properties.setDatagramSize(min(BUFFERSIZE*4, 8192));
  properties.setDatagramSize(5136);  //5136 is the minimum 
  oscP5= new OscP5(this, properties);
}

void oscEvent(OscMessage msg) {
  if (msg.checkAddrPattern("/fftArray")) {
    for (int i= 0; i<BUFFERSIZE2; i++) {
      fftArray[i]= msg.get(i).floatValue();
    }
  }
}

void draw() {
  background(0);
  noFill();
  for (int x= 0; x<BUFFERSIZE2; x++) {
    stroke(fftArray[x]*255.0, 0, 0);
    line(x, height*0.1, x, height*0.9);
  }
}
*/

//--supercollider code:
(
var buffersize= 2048;
var buffersize2= buffersize.div(2);
n= NetAddr("127.0.0.1", 47120);
s.options.memSize= 8192*2;
s.waitForBoot{
	c= Bus.control(s, buffersize2);
	SynthDef(\avTrk, {|in= 0, t_trig= 0, amp= 1, bus|
		var z= Mix(In.ar(in, 2)*amp);
		var chain= FFT(LocalBuf(buffersize), z);
		Array.fill(buffersize2, {|i|
			var a= Unpack1FFT(chain, buffersize, i);
			var d= Demand.kr(chain>=0, 0, a);
			Out.kr(bus+i, d.min(1));
		});
	}).load;
	s.sync;
	~trk= Synth(\avTrk, [\in, 0, \amp, 0.3, \bus, c]);
	a= play{var a=SinOsc;Splay.ar(a.ar(PulseCount.ar(f=InFeedback.ar(0,2).sum)%999+(60,63.0005..99)*a.ar(2**f)*2+[3,4],f>0*f*9)).tanh*MouseX.kr(0, 1)};
	
	Routine.run({
		inf.do{
			var fftArray= c.getnSynchronous(buffersize2);
			n.sendMsg(\fftArray, *fftArray);  //sending 1024 values
			(1/61).wait;  //a tiny bit faster than framerate
		};
	});
	CmdPeriod.doOnce({c.free});
};
)
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«Re: example fft sc->processing» by Don Smith (private)
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Fredrik Olofsson user 14 Aug'14 18:22

an extended version is here... http://sccode.org/1-4Wt