soens X1d Exp 32 & 64bit does not have this problem so it must be tied to the way X2a sees USB. Tell me why it would see USB differently than X1, tell me.
AndertonTry plugging directly into your motherboard's USB connection instead of the hub. FWIW the way I've achieved the most reliable audio/USB operation is by dedicating a 4-port USB PCI card just for audio devices (note that combo USB/Firewire cards aren't recommended).