I'm trying to set up a T60 (2.00 Centrino Core Duo, 2G ram, 100G/7200 HD), a MOTU 8 Pre, and Reaper in a casual/dual use environment. So far: I can record fine, plenty of power, but playback is sketchy. It works fine for a while, then will start "grumbling" by itself. After a while, the signal...