FWIW, because every clue can help in a situation like this, I've been using the USB connect from my M-Audio Keystation Pro 88 since the first beta release, under XP SP3. Works fine. Input and Output side.

Try the Opt. menu, Return to Factory Settings and hit button numner two there, to have the program look for and readdress all MIDI and Audio outputs as well as reset the other stuff. Might do the trick.


--Mac

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