Is it possible to set up the 568 so that the LR speakers are boosted in volume when playing surround, but not in stereo?

Lounge: LG 55B6v, Lyngdorf TDAI2170, Anthony Gallo Reference AV, M&K MX7000SF, RPi, AppleTV, Some crappy Sony bluray
Office: NuForce HDP, Parasound Zamp, Monitor Audio CPW Gold
Headphones: Sennheiser HD6XX, B&O H6mk2
Should sell sometime: 568 + 3xDSP33
Land Rover Discovery with 825w Meridian sound system
Explorer v1