I think that Jeffreybehr and Eldartford are both correct. It is my uderstanding that Dolby Surround was one of the first implementations of multichannel. The front left and right stereo channels exist of course, and then the diffeerence between the left and right front signal is sent to the rear as a mono signal for a surround effect. So Jefferybehr is correct in describing Dolby Surround as a matrix of only two channels. Eldartford is correct in saying that something else exists other than the two front channels as a separate data stream, i.e. the mono matrixed rear channel(s).
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?
I didn't know that any CDs were multichannel. Does this conform to the Redbook specs? Are there other discs like this?