Basically Dp will let you bounce in MP3 with the lame engine installed..here's a link
http://www.versiontracker.com/dyn/moreinfo/macosx/22570
(Installation is explained in the read me)
Also WAVE, AIFC, AIFF, Next/SUN, Apple CAF (Core Audio Format)
wich is surround)
Mpeg4 doesn't work out of DP, and the response I got from Motu
was it's a problem on Apples end that needs to be addressed.
All of the above formats are exported using Apples Core Audio.
So it's possible that Audio Desk can export in these fomats as
well.
I'm not sure of that as I don't have Audio Desk installed right now.
Anyway, hope that helps.