Summary edit

Source code edit

Source code (which I also release under the license given here) runs in w:SuperCollider:

// Written by Dan Stowell, September 2006

b = Buffer.read(s,"sounds/break2.snd"); // Provide a simple breakbeat loop
(
var ampTable = Signal.hanningWindow(1024,100).squared;
var ampBuf = Buffer.loadCollection(s, ampTable);

SynthDef("accelerando_inf1", { arg out=0,bufnum=0;
	var pos, posses, pitches, amps, sons;

	// "pos" is a kind of master pitch control, linear varying between one and zero
	pos = Phasor.ar(1, 0.007 / SampleRate.ir, 0, 1);
	
	posses = (pos + ((0..4)/5)).wrap(0.0, 1.0); // Evenly spaced circularly within 0 to 1
	
 	pitches = (0.2 * 2.0.pow(posses * 5));
	
	amps = BufRd.kr(1, ampBuf.bufnum, posses * BufFrames.ir(ampBuf.bufnum));
	
	sons = (PlayBuf.ar(1, bufnum, pitches.poll(100), loop:1) * amps * 10);
	
	Out.ar(out,
		Pan2.ar(sons.mean.softclip)
	)
}).play(s,[\out, 0, \bufnum, b.bufnum]);
)

Originally published online at http://swiki.hfbk-hamburg.de/MusicTechnology/826

Licensing edit

I, the copyright holder of this work, hereby publish it under the following license:

This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.

You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue