its really not a big deal, but I felt it was worth mentioning.
on long recording sessions, if recording without two sound source mixing, say if I'm doing voice commentary, the game audio will lag just behind the commentary. its noticeable, but not enough to say that its that big of a problem, just in parts when I sing along to the music, and my voice is just a bit out of synch with the music.
again, not that big of a deal, but would be nice to have perfect synch ;P