Originally Posted by sdurani
Can't underscore the above enough. Being able to customize the surround processing to your personal preference and varying source material is extremely helpful. The PLII Music mode can be adjusted to be as subtle or as agressive as you like.
For someone used to 2-speaker playback, I would suggest initially setting the Centre Width to 7 (no centre info extracted) and Dimension to +3 (minimal surround extraction). You can then start moving the Centre Width parameter towards 0 (zero) to find out just how much centre fill you like. Same with the Dimension parameter, adjusting it towards -3 until you find out how much surround extraction sounds best to you. Will vary with material, but definitely worth experimenting with.
Actually, you have Dimension backwards: +3 is most surround extraction, -3 is least. At least that is how it works and sounds on my Onkyo:
With this setting, you can move the sound field forward
or backward when using the Dolby Pro Logic II Music
or Dolby Pro Logic IIx Music listening mode. It can be
adjusted from –3 to +3 (default is 0). Lower settings
move the sound field forward. Higher settings move it
If the stereo image feels too wide, or there is too much
surround sound, move the sound field forward to
improve the balance. Conversely, if the stereo image
feels like it is in mono, or there is not enough surround
sound, move it backward."
I normally use a center width of "4" and a Dimension of "0" or "+1". I also prefer "Panorama" turned "On".