When we talked about the game back in '05, you spoke about procedurally generated music. Where did that end up?
Well, that was one of the things I was really at the outset very skeptical of because I never really heard any decent procedurally generated music. At some point in the project, though--probably right around then--we hooked up with Brian Eno who ended up working with us on the procedural score. So actually we ended up with over probably--about half of our music is now procedurally generated within the game based upon things you make.
We found it was so fun, we've actually built this little kind of harness where Brian and our sound engineer could play around with the underlying levers on the procedural engine. This is one of those things that became so fun to play with, we decided we had to surface it the player. So in the game right now, when you're designing a city, one of the things that we allow you to do is open this little device and compose your own theme song for your city--
Wow.
--and it's actually using the procedural generator. So I can hit the "roll the dice button," and it generates a new procedural melody with rhythm, or I can actually grab the notes, and if I want to even put in my own tune on the notes. We've basically turned the procedural music generation into its own little toy and embedded that within the game as well.