Just how fully-functional is Rock Band 3's keyboard controller? Synthpop sensations Freezepop are utilizing the peripheral onstage during their current tour, so we asked them.

Relive this weekend's PAX concerts next week in Rock Band, with a triple dose of Freezepop and a three-pack of PAX songs from Jonathan Coulton, MC Frontalot, and Paul and Storm.

It's late, I'm tired and the last thing I really want to hear right now is a Theremin solo by Freezepop – but since the other 1800 people in this room can't seem to get enough, they've come back onstage for a two-song encore that'll push Jonathan Coulton back by another half hour at least. I mean I know they're in…