I just came across Syrinscape, a program that claims to provide an auto-generated soundtrack for your roleplaying game.
- to be non-repetitive;
- to be easily configurable to suit the setting and mood of your game / scene;
- not to need attention during the game itself – just let it run;
… all of which sound great, if it can actually deliver on them.
The program is not available yet, although there is an old version available apparently – but they recommend you wait for the new version.
One to keep an eye on!