'Kicks' and 'Zen zenith' have been made with Soundmaps. 'Kicks' uses three drums that have different beat intervals. Please visit the 'kicks page' for details and to hear the instruments separately.
After having explored some of the possibilities of Soundmaps, I wanted a program to make something more resembling melody:

(DEM, deun being dutch for tune). The program randomly choses a progression of chords from a chord transition-probability matrix and then creates melody randomly using the notes of the chord triad when on beat and any note of the scale when off beat. The notes of septime or notes of the next chord to follow are used sometimes at the end of the measure to create a transition towards the next chord. This project gives encouraging but not extremely exciting results: 'Lucky Luke', 'Opus 7' and 'Tingel blues'. 'Praagse lente' is possibly somewhat more interesting. However, there is still room for improvement by applying more rules.

In an other project I've used electrophysiological recordings (nerve potentials, ECGs, discharges by electric fish etc) to make something resembling music .

A user friendly version of the program Soundmaps may be downloaded (a 2.4 Mb zip file. For PC, >500 MHz). You can also download the file-to-Sound F2S player I made. This player can make sound out of all the files you have on your hard disk.