How does this work? (this might belong on CS, but it's music being algorithmically composed by one-liner C programs)

http://www.youtube.com/watch?v=GtQdIYUtAHg
http://www.youtube.com/watch?v=qlrs2Vorw2Y
http://www.youtube.com/watch?v=tCRPUv8V22o&feature=relmfu

also, how would I go about converting the output from those programs to actual music files?

Question

How does this work? (this might belong on CS, but it's music being algorithmically composed by one-liner C programs)

http://www.youtube.com/watch?v=GtQdIYUtAHg 
http://www.youtube.com/watch?v=qlrs2Vorw2Y 
http://www.youtube.com/watch?v=tCRPUv8V22o&feature=relmfu 

also, how would I go about converting the output from those programs to actual music files?

shadowfiend · Answer

There's a decent amount of discussion on this at http://stackoverflow.com/questions/180858/procedural-music-generation-techniques (I myself don't know much about procedural music generation).