Here's a sneak peek of the recording of the main theme of Zeno Clash 2. Professional musicians performing in this video were accompanied by members of the choir of the Municipal Theater of Santiago - one of Chile's most prestigious cultural organizations. You can also get a glimpse of Patricio Meneses (director and composer) waving his arms like a madman. :)
http://www.youtube.com/watch?v=5OoDHJ5Z_T0
The full soundtrack of the game (which contains over 40 tracks!) comes as part of the 'Special Edition' of the Steam copy of Zeno Clash (which also includes an awesome digital Artbook). A preview of some of the Artbook pages is also present in the video.
Put on a nice pair of headphones and enjoy the music!