Yes there was consideration of a third center channel. Have you ever listened to the old Living Presence mixes that were recorded with a third center channel from the 50's?? There were released on SACD years back and it sounds much better/fuller and much more spacious than the plain stereo versions.
Rob
Haven't tried that, though I think I have a couple of those discs.
I wonder if a derived center channel works as well.
Do you use an HT set up for that? And, do you play all three channels the same sound pressure level?
"Audio is filled with dangerous amateurs." --- Tim de Paravicini