Which audio format to use for 6.1 and 7.1

bevo
bevo Posts: 306
Whenever I watch blu rays, my ps3 automatically sends out a multi channel pcm 7.1 signal. My receiver can send sound to all 6 of my speakers.

But when I watch cable, and it's dolby digital, which type of audio signal should I use. My choices are
1.Dolby digital (only uses 5.1 channels)
2.dolby digital ex( with it my receiver uses all 6 speakers)
3.Dolby D PLIIx M(my receiver also uses 6 speakers)

So which is better EX, or PLIIx M?
Denon 1909, want to upgrade for pre outs
Fronts-polk RTi A5
center-polk CSi A4
Sides Polk FXi A6
rears- polk rm8's
sub-SVS pb-13 ultra
Blue ray-ps3
Panasonic plasma 50 inch
Buttkicker(don't use or need it anymore since getting the Ultra)
Post edited by bevo on

Comments

  • bevo
    bevo Posts: 306
    edited February 2009
    Keiko wrote: »
    Whichever sounds best to you. ;)

    As far as I know though, cable television only transmits Dolby Digital 5.1 and only if available.

    It's my receiver that converts it to dolby digital ex, or dolby d PLIIx M, that way I can use the back channel or channels for 6 or 7.1.
    I'm really just wanting to know the differences in the 2.
    Denon 1909, want to upgrade for pre outs
    Fronts-polk RTi A5
    center-polk CSi A4
    Sides Polk FXi A6
    rears- polk rm8's
    sub-SVS pb-13 ultra
    Blue ray-ps3
    Panasonic plasma 50 inch
    Buttkicker(don't use or need it anymore since getting the Ultra)