This will affect how your sequence is played out to a tape deck, (or mixer) and it will also determine the channel assignments for a multichannel Quicktime or AIF file. In discrete channel, each channel will go out as a mono stem. Ch 1 Ch2 Ch 3 and so forth. With Channel grouped, if you have say, two mono channels, and 1 stereo channel, it would be exported as Two Mono Stems and One Stereo Pair. If you set it to stereo mix, it will downmix everything.
You have to set your channel assignments by right clicking the left part of timeline, where you would patch your tracks (and disable or lock tracks)
Richard Sanchez
North Hollywood, CA
“We are the facilitators of our own creative evolution.” – Bill Hicks