Project: p5_sc / Examples: Buffer.getn

Examples: Buffer.getn

SuperCollider reads from the audio input to a single-channel buffer, whose contents are continually read to Processing via buffer.getn and displayed as a waveform.

SynthDefs

SynthDef(\recordbuf_1, { |bufnum = 0, outbus = 0, amp = 0.5, loop = 0|
	var data = RecordBuf.ar(AudioIn.ar(1), bufnum, 0, 1, 0, 1, loop);
	FreeSelfWhenDone.kr(data);
}).store;

Processing Code

import supercollider.*;

Buffer buffer;

void setup ()
{
  size(256, 256);
  background(0);
  stroke(255);
  
  buffer = new Buffer(width, 1);
  buffer.alloc(this, "done");
}

void draw ()
{
  buffer.getn(0, buffer.frames, this, "getn");
}

void done (Buffer buffer)
{
  Synth synth = new Synth("recordbuf_1");
  synth.set("bufnum", buffer.index);
  synth.set("loop", 1);
  synth.create();
}

void getn (Buffer buffer, int index, float [] values)
{
  background(0);
  
  for (int i = 0; i < values.length; i++)
  {
    point(i, (height * 0.5) + (values[i] * height * 0.5));
  }
}