I thought I'd share this link
with all of my fellow Mute Math fans...
It has some video footage of him playing a couple of Mute Math tunes, discussing his pedal board, and talking about roundwound vs. flatwound strings.
IMHO, this is one of the few bands that you should really go see live. I saw them on October 30th when they came through Houston. Incredible performance. Roy also does some really cool stuff with bass synth (microKorg, I believe) and his upright, on which he uses p-bass pickups located right below the neck.