Sound Manipulator PPC

    A Phasevocoder program for MacOS 9.x.

Future Projects:

CAC III is replaced by CACE4, also a total makeover for OSX.

Fuzzy Logic Controller, for Max / MSP.

Release of a DVD 5.1 of the ‘Fifth string’ project (Autum 2012).

Release of a DVD 5.1 of the ‘Regelmeesters’ project (Autum 2012).

Release of a DVD 5.1 of the ‘Chorus ex Machina’ project (Autum 2012).

Release of all major compositions on a DVD 5.1 (Autum - winter 2012).


    Computer Aided Composition (CAC III) is a Computer Composition environment (written in   Common Lisp) for creating algorithmic compositions in MacOS 8.x/9.x

    Computer Aided Composition Environment 4 for MacOSX , is the latest version of my algorithmic composition environment, written in LispWorks 6.x. It is a new redesign of the previous CAC III version (was only for MacOS 8.x/9.x).

First versions will be ready in the second half of 2012.

    A computer program for doing DSP in an object oriented way.

    Used for composing and teaching students DSP and creating object oriented computer 

    programs.  Works for MacOSX (10.6.x -10.8.x)

Some thoughts:
I have written several applications for use as an algorithmical composition tool (for generating  serial and aleatoric and fractal-based music) or as an ‘interactive real-time’ tool for sound  manipulation and as a guidance for players.
At this moment I’m working on a compositional environment (CACE4) which makes use of  several different approaches. It’s an object oriented programmed tool kit with a generic part  that makes use of several fractal and attractor based algorithms and an AI part that helps with  the decision making and grouping of the musical material (it consists of an ART-2 neural network and I am working on a production ruler and some frame based knowledge).This compositional tool kit acts as an interface between several existing applications (e.g. Finale™ and CSound) and can generate several file formats (STD MIDI file and AIFF).
My main field of interest is in the possibilities of using the computer as a live, interactive media for performing compositions; especially computer and musicians interacting together. And to make use of it as a compositional tool.

As one of my major ideas about composing Algorithmical music I like to look for structure in other fields in science and nature.

I like to find – mathematical - structures and use them for generating pitches, melodies, rhythms and structure for my compositions. Material obtained from for example fractal calculations and A.I. (= Artificial Intelligence) techniques, along with Biometrics and Physics, but also mathematical material from economy can be used for this purpose to generate scores and sounds.

To achieve this I write my own dedicated software for doing DSP and generating scores which are then played, mostly by musicians. The sounds and music played by these musicians are altered in real-time during the performance of the pieces.

So in most cases it’s not the rules derived from music itself as we know it, but new ones from other fields used to create new structures for music and sound, as well as finding out which ones are working in the field of Music and Sound.

Michèl Koenders, May 2010.


Short movie about me, made by Floor Houwink ten Cate © 2007 (FHC)