Some info about the DSP used in the 990:
http://www.cirrus.com/en/pubs/proBulletin/CS49400PB_0503.pdf

Most interestingly, an article about the "Intelligent Room Calibration" feature that Cirrus developed for their CS49400/CS49500 DSP:

http://www.cirrus.com/en/pubs/proBulletin/IRC_PB.pdf

That article mentions two levels of calibration, one which is just for speaker setup, and the other involving room EQ. We know that Outlaw chose to not implement an automatic room EQ feature at this time. It's possible the speaker setup portion is based on this Cirrus reference design, though.

A press release about "IRC":
http://www.cirrus.com/en/press/releases/P426.html