M-Audio have posted a new Driver for the Revolution 7.1 - Version 5.10.00.36. Here's what's updated;
1) Direct Monitoring Is Enabled by Right Clicking Icon in System Tray.
2) AV Sync Input Delay Resolved.
3) Quick Switch Save Button Added to Control Panel.
4) ASIO Input 24dB Drop Fixed.
5) Glitches in WDM Signal while running direct monitoring fixed.
. We'll have our review of that Soundcard up this week.