Just “discovered” a music exploration site that lets you pick a mood combination and play songs appropriately. You can pick genres and refine your preferences on the radio service. That got me thinking, how does one judge musical mood from a piece of music? A brief google search showed up lots of research in that area as well as several societies and contests. So then the natural question was whether people are using this in music generators. Not much success this time. Startup time, people!!! Though I did find a BRILLIANT generator that works on cellular automata.
Musicovery LINK: http://musicovery.com/
Wolfram Tones LINK: http://tones.wolfram.com/generate/