[ShnuggMac]

Multichannel has no processing to the already discrete 5.1 or 7.1 [if present] other then the bass management and time aligment.
DPLII is meant for 2ch sources, so naturally it can't be selected if there are more then 2 ch being present. If there is only 2ch comes in, yes I would use this over "stereo" for movie soundtracks for sure.

Oh, yes, I DEFINITELY use Pro Logic II MOVIE for two-channel Dolby Surround-encoded DVDs, of course; but what I am asking is, should the player be set to 2-CHANNEL output, that way I can use the Pro Logic II modes, or whatever, to play the PCM tracks, too? Or should MULTICHANNEL mode be it?

I use the 100hz, it has nothing to do with what sub you're using or how the other filter for bass redirection is set. This is only affects the discrete LFE content, and only it's top end which is brickwalled at 120hz anyway.

So, should I keep this at 100, also? Or what would you recommend?

Use bitstream.

It's rubbish, don't buy it.

Okay, so can you definitely confirm that there is no "DTS-HD" content coming off a Master Audio disc that is being sent when the player is set to PCM? EITHER WAY, my receiver is SEEING only the core DTS track, correct? So keeping it on BITSTREAM for playing back these Master Audio tracks is okay on my system -- I'm basically hearing the core DTS mix anyway?

In theory it shoudn't affect, and if you set everything neutral I.E.multichannel all speakers to "large", subwoofer to "yes" and all speaker trim levels and distance setting left at 0 it will have very little or no affect at all for the HDMI output as far as the how the soundtrack is presented.

The '10A's speaker setup for multi channel operation does not appear like that in a menu; it shows all the speakers in a graphic, and you can select their size by changing the graphic to a small or large speaker, and the calibration levels can only be trimmed by 0 to NEGATIVE REPRESENTATIONS -- there is no positive calibration values above ZERO on this menu; furthermore, there is no way to select subwoofer yes or no; I have done all these settings, however, in the receiver. I just hope these speaker settings, because I have selected MULTI CHANNEL based on your recommendations, are not affecting the HDMI output of the player...