I wanted to hang up this project, but Johannes Schindelin persuaded me to go on with this Perl version. It needn't samples, it generates a sine sound on its own and the 'engine' which decides which sound is taken by accident is another. Hm, of course, that could only be your decision if the NEW Randomposer were available at the moment. So use old Randomposer. Well there are much of options in Randomposer.
All options are optional but they influence the results in a certain way.
First you can start Randomposer without options. After a succeeded installation you can start with rposer or randomposer. Then you'll see the possible options. When it composed something good, but you forgot to save it, don't get worried. Copy it and then play it with the -P option.