For a 990; a sms-1 and tonal adjustments for the speakers with accross the board osd tv display for sound, for any speaker set-up. Then mixed speaker set-ups could be used a little more easily;(better sound);is what we want anyway. For video, just pass it through to the display the way it came in to the 990. Personally I like the 990 the way it is, thats why I bought it. I dont think outlaw should bend over backwards to keep up with the other this and thats for the HDMI specs 1,2,3,4,? until this really settled.