Some people don't like to play poker with music (distractions etc.) but for those of us who get bored of listening to the computer buzz and like a little aural wallpaper this band offer an album and an EP which you can download for free of their website.
It's pretty ambient stuff, difficult to tilt to, and won't get you too worked up.
I'm liking it a lot so far.
http://www.motionlessmusic.com/
Here's an example.
