When playing CD's in stereo by pass mode, is that only left and right, or is the sub included? And if it is only left, right, is there a mode on the 950 that plays music in L/R and Sub?

My Sony STRDA3ES has this Auto-format mode and it matches the source's recording with it's correct sound source(nice little feature for a receiver).

After selecting, my CD's go into L/R/Sub, now I if I select direct stereo, then it's only L/R. Well the sub really makes a difference in my opinion.

Thanks,