As part of a research project we created a program that can help amateur musicians compose accompaniments with very little or no musical knowledge. In particular, if you begin with a simple monophonic piece (saved as a MIDI), the program will help you interactively evolve accompaniment simply by listening to candidate accompaniments and telling it the ones you like the best.
The program is not commercial and is completely free to the internet community. We'd be very interested in feedback on your own experiences with this program, so we hope you'll give it a try and let us know if it's interesting to you.
The program, called MaestroGenesis, is at:
http://www.maestrogenesis.org/
To go direct to download, you can go to:
http://www.maestroge...s.org/downloads
There's also an easy online tutorial with a video at:
http://www.maestrogenesis.org/docs
Best Regards,
Amy