Media Player Classic Home Cinema (MPC-HC) - DXVA!

[Mercury_22]

Originally Posted by DrNein

That's weird because in their diagrams for 5.1 are shown Left Surround and Right Surround being at the sides as expected but for 7.1, Left Surround Side and Right Surround Side appear augmented by Left Surround Rear and Right Surround Rear. If the text above is correct then for 7.1 the side mapping would be switched to rear rather than simply adding the rear and the additional sound would then be side.

I have always had the understanding that the rear surround AKA back speakers were the additions in a 7.1 configuration (from either Dolby or DTS).

Why wouldn't be correct ?

If that it's not enough you can check other DTS resources like DTS-HD Brochure

...The two most popular speaker placement in consumer’s homes are 5.1 plus two additional speakers at the left and right side positions (90 degrees from the listener) or the left and right rear surround
positions (120 degrees). ....

or DTS-HD White Paper

...With 7.1 channels of sound, DTS-HD Master Audio immerses the listener in sound and creates a “you are there”
listening experience. Using additional left and right side surround channels, it goes far beyond traditional surround
sound to create an amazingly realistic and dynamic sound environment that radiates near perfect sound coverage
throughout the listening room....

that you can find on the same DTS page with my previous text

So yes the additional surround channels for the 7.1 are on the side and the 5.1 surround channels are on rear

P.S. This is my LAST comment on this matter !

Test 5.1 AC3 (Dolby Digital)
Test 5.1 Dolby TrueHD
Test 7.1 E-AC3 (Dolby Digital Plus)
Test 7.1 Dolby TrueHD
Test 7.1 DTS-HD HR
Test 7.1 LPCM