A CD that is Multichannel

I just bought a CD, Angel CDQ 7243 5 55199 2 4 (good grief what a number) that is the 1994 Broadway cast recording of "Carousel". As it was playing I noticed on the cover the "Dolby Surround" logo. I went over to the prepro, which was set on 2 channel analog input, selected digital input and Dolby, and Bingo! Multichannel. Not bad either.

I didn't know that any CDs were multichannel. Does this conform to the Redbook specs? Are there other discs like this?