7.1 vs. 5.1 - Meaningful difference?

Mds

Logic 7 and/or DPLIIx will extract and process the information in the 2 surround channels of 5.1 sources, and generate 4 channels for playback: 2 sides and 2 rears. These algorithms do not add anything that is not already in the surround mix, but distribute the information across 4 rather than 2 discrete playback channels for a better spatial presentation.

2 side speakers alone don't provide good front to back depth. 2 rear speakers alone don't provide good side to side breadth. With both side and rear surround speakers (7.1), you get better envelopment.

The proof of course is in the listening. If possible, recommend you listen to a properly set up 7.1 system (not necessarily that easy to find), and toggle between 5.1 and 7.1.

Thanks
Bruce

It depends on the size of the room... but I think it's usually not worth the extra $$$ and effort to make it 7.1

5.1 is just about right for me for now...

not all DVD is 5.1, EX is 6.1

Eandylee,

How would the size of the room make a difference on going to 7.1?

Certain room layouts make a difference, but size itself should not be an issue. My room is not large, 13' x 17' x 9.5', and 7.1 works very well.

Thanks
Bruce

I should have added Size and Shape...

Works for what though?...

DTS/DD recorded for 5.1 or 6.1? or DVD-Audio? or DPLII/DPLII-EX for music?

7.1 might sound great regardless of the shape and size of the room when listening to 6.1 recorded sound track.

But in reality, most of the movies and DVD-audio are recored 5.1 and the two back channels are 'matrixed'.

If you stuff in 7.1 in a small narrow room and listen to 5.1 recorded sound track, it may not add any value or even effect negatively... Well postioned 5.1 in a proper size room may work best for 5.1 recored sound tracks including movies or DVD-A/SACD