“How do I use my USB connection to configure the Sac2.2 control surface with Digital Performer?”
At this point a FreeMIDI USB driver does not exist for the Sac2k or Sac2.2. Radikal Technologies is expecting to release a driver soon.
For the time being there are a couple of workarounds: You can use MIDI cables and your MIDI interface for communication with FreeMIDI and DP. Or use the Sac2.2’s OMS USB driver. FreeMIDI is perfectly capable of working with OMS. It’s pretty easy to get FreeMIDI to use OMS for communication since the function is now included in the FreeMIDI software. If you are unfamiliar with this or would like more information about FreeMIDI working with OMS we have done more in depth tips about this in the past. See the Tech Tips from 4/17/2000 & 11/02/2001 for a good start.