I know in the past we have had some issues with the Audigy boards, but I am not sure with the Audigy 2 board.
What I would recommend you to try to see if it will do anything for you is what is stated in this post:
http://forum.mtu.com/showthread.php?threadid=1796
This will tell you how to change your Sound Card Hardware acceleration. I would give this is a shot and see what happens.
Dave had sent you a link for the information on getting a beta copy of Keyrite, so you should have had this email from him a week or so ago.