I just read this interesting article on the NY Times website:
http://opinionator.blogs.nytimes.com/2010/01/25/the-accidental-music-lesson/?hp
It has some great excerpts from his Film Symphony, "Gotham".
Rushes (2012) for seven bassoons
https://www.youtube.com/v/XOLnoGGfmJY
[asin]B00I5302SO[/asin]
This is an amazing work of music. Layered seven bassoons create a stunningly beautiful sound world lasting for one hour. I was deeply impressed.