Think, yes, the 'front', singular, would mean the center, as in dialogue, as well as music and sounds common to the front mains, unless the discrete mix intentionally excludes any of this from the center channel. That's one of the 'advantages' to discrete multi-channel sound.

have you ever noticed the gross difference in center-channel output when listening to music, and switching between 'stereo' and 'pro-logic'?

Larry
www.fineelectricco.com