The Unfinished Swan
60 minutes of BAFTA-nominated original music for the first-party PS3 exclusive, developed by Giant Sparrow and SCEA Santa Monica, featuring a live string orchestra recorded at Ocean Way, Nashville.

Interview with Emily Reese on Top Score, Minneapolis Public Radio (requires Flash).
Also on iTunes if you're looking at this on iOS.

Description of the interactive music system:

Entry 2 from the Developer Diary about the music:

Interview on