In the past, with some DVD's, I would have to increase the center channel level as much as +5 or I would have to crank the overall volume so that voices could be loudly heard from all seating positions. You can see where this could be a problem: in the former case you won't achieve as seamless a blend between the mains and center, and in the latter case things tend to get too loud. Just a note: I never have had any problems with DTS discs and low levels of voice in the center channel...DTS is always super clear. Thanks to a Ms. Nomer (!), I heard that the yamaha dspA1 could defeat dialogue normalization. I went through the setup menu and there was a setting under "Cinema EQ" which turned on equalization for the LCR channels. I turned this off, and now vocals are loud and clear at CC levels of just +0 or +1 with virtually all my DD discs! So if you guys are having this problem, you might want to look through the receiver setup menus and either turn off the dialogue normalization, or you should adjust equalizer settings to achieve good tonal balance (if you are able to do this...you can check tonal balance by playing test tones through each speaker and try to get the closest match that you can). Good luck!