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  1. #1

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    Default 7.1 surround with dolby digital

    When you upgrade from 5.1 to 7.1, do the rear surrounds play the exact same as the side surrounds? or do they get separate signals?

  2. #2

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    All channels have separate out puts on your avr. Your auto cal program will try to adjust the volumns so as nothing is localized. The sides play a more important role than the rears do.

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    Sorry, in 5.1 recordings the avr separates the signals, but 7.1 the studio assigns them. They are separate signals.

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    Ok thanks.

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    They are separate signals, but relatively few blu rays have discrete 7.1 recordings. In practice your receiver will synthetize the back channels.

    Getting front heights (if you receiver supports them) is a better bang for the back IMO.

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    Quote Originally Posted by unclemat View Post
    They are separate signals, but relatively few blu rays have discrete 7.1 recordings. In practice your receiver will synthetize the back channels.

    Getting front heights (if you receiver supports them) is a better bang for the back IMO.
    Keep in mind that 7.1 is now a theatrical format, and damn near every recent big-name movie has a 7.1 track on Blu-ray. For instance... The Hobbit, Lincoln, Les Miserables, Life Of Pi, Rise Of The Guardians, Dredd, The Bourne Legacy, Finding Nemo (remixed for 7.1 for its 3-D run and the Blu-ray by Gary Rydstrom), The Hunger Games, Abraham Lincoln: Vampire Hunter, The Expendables 2, Brave, Prometheus, The Avengers, The Cabin In The Woods, Snow White And The Huntsman, John Carter, Mission Impossible: Ghost Protocol... all in native 7.1.

    You'd be missing out on a lot by going synthesized/extracted height channels (as much as I love them in my 9.1 setup) over discrete rear surround channels now that it's a theatrical format. That "relatively few" thing isn't the case anymore.
    Equipment list:
    Onkyo TX-NR3010 9.2 AVR
    Emotiva XPA-3 amp
    Polk RTi70 mains, CSi40 center, RTi38 surrounds, RTi28 rears and heights
    SVS 20-39CS+ subwoofer powered by Crown XLS1500
    Oppo BDP-93 Blu-ray player
    DarbeeVision DVP5000 video processor
    Epson 8500UB 1080p projector
    Elite Screens Sable 120" CineWhite screen

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    Abraham Lincoln: Vampire Hunter. That was awesome.

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    Thanks...haha Vampire Hunter was surprisingly good i thought too

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    They get separate signals. I am about to upgrade to 7.1 myself.

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    Quote Originally Posted by Lost240 View Post
    They get separate signals. I am about to upgrade to 7.1 myself.
    I upgraded about 18 months ago and wished I hadn't done it. I don't think I hear anything more out of my 7.1 than I did with a properly set up and balanced 5.1 system. As referenced above, the side surrounds are more important than the rears.
    Last edited by SugarmillMan; 03-18-2013 at 10:04 AM.
    Fronts:B&W 804 Diamonds, Center: B&W HTM2 Diamond, Surrounds: PolkAudio LSi F/X (4)
    Subwoofer: HSU VTK3-MK3
    Electronics: Onkyo TX-NR 3010 receiver, Parasound Halo A31 amp, NAD T975 amp

  11. #11

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    Quote Originally Posted by SugarmillMan View Post
    I upgraded about 18 months ago and wished I hadn't done it. I don't think I hear anything more out of my 7.1 than I did with a properly set up and balanced 5.1 system.
    Ha I refuse to believe this. you don't feel more surrounded??

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    Quote Originally Posted by ScottyDugs View Post
    Ha I refuse to believe this. you don't feel more surrounded??
    Nope. The sound is just not that much improved, if at all. And yes, I have a good room location and run Audyssey XT32 a few times to get it right.
    Last edited by SugarmillMan; 03-18-2013 at 03:51 PM.
    Fronts:B&W 804 Diamonds, Center: B&W HTM2 Diamond, Surrounds: PolkAudio LSi F/X (4)
    Subwoofer: HSU VTK3-MK3
    Electronics: Onkyo TX-NR 3010 receiver, Parasound Halo A31 amp, NAD T975 amp

  13. #13

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    [QUOTE=SugarmillMan;1895968]I upgraded about 18 months ago and wished I hadn't done it. I don't think I hear anything more out of my 7.1 than I did with a properly set up and balanced 5.1 system. As referenced above, the side surrounds are more important than the rears.[/QUOTE
    If everything is set up and calibrated properly, the difference shouldn't be very noticeable when going from 5.1 to 7.1. When you add any channels beyond the 5.1 the same should hold true, 5 not much different than 7,add front heights, again not much different.
    Try taking the rears out of your system, that's when you'll notice the difference.

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    I run wides and set my AVR to Audessey DSX and double my front stage during musical scores and explosions. I get exaggerated wide sounds for anything shooting, driving, flying or just anything that's happening off to the side.
    Draggn' knee is exhilarating, 150mph wheel standers are pretty cool too


    Home Theater-7.2
    Display-SamsungPN64D8000 | Receiver-Onkyo TX-NR807 | Source-OPPOBDP-103 | Amplifiers-Emotiva; XPA-2 x2, XPA-3 | Speakers: PolkAudio; mains-RTiA9, rears-RTiA9, center-CSiA6, surrounds-FXiA6 | Sub-Epik Empire x 2 | Interconnects-Emotiva


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    First purchase will be; a pair of ? but I'd love a pair of SDA SRS

  15. #15

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    Quote Originally Posted by SugarmillMan View Post
    Nope. The sound is just not that much improved, if at all. And yes, I have a good room location and run Audyssey XT32 a few times to get it right.
    What I'm saying is that with the equipment I am running, I get excellent sound quality. However, I don't believe it's that much improved going from 5.1 to 7.1.
    Fronts:B&W 804 Diamonds, Center: B&W HTM2 Diamond, Surrounds: PolkAudio LSi F/X (4)
    Subwoofer: HSU VTK3-MK3
    Electronics: Onkyo TX-NR 3010 receiver, Parasound Halo A31 amp, NAD T975 amp

  16. #16

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    Quote Originally Posted by SugarmillMan View Post
    What I'm saying is that with the equipment I am running, I get excellent sound quality. However, I don't believe it's that much improved going from 5.1 to 7.1.
    If you were getting good phantom imaging from the sides in 5.1 already, then I guess that's understandable. For me, the biggest difference was with video games... and it gave me a nice advantage in hearing precise placement of things behind me in first person shooters. Still, with all the killer 7.1 discrete tracks out now, I'm surprised that you don't hear the advantage of the rear surrounds.
    Equipment list:
    Onkyo TX-NR3010 9.2 AVR
    Emotiva XPA-3 amp
    Polk RTi70 mains, CSi40 center, RTi38 surrounds, RTi28 rears and heights
    SVS 20-39CS+ subwoofer powered by Crown XLS1500
    Oppo BDP-93 Blu-ray player
    DarbeeVision DVP5000 video processor
    Epson 8500UB 1080p projector
    Elite Screens Sable 120" CineWhite screen

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    I have to run mine 3db higher than audyssey had them set. Otherwise they don't contribute much ambiance only the loud transient portions were audible from main seating position.
    Sources-Pro-ject Debut Carbon,Sony Bdp-s5100,Toshiba HD-a3(cd transport)
    Processing and Power-Onkyo TX-NR717, ATI AT1202
    Mains-Polk Audio RTi12's
    Display- LG 60PA6500
    Misc. Panamax m4300 conditioner, Blue Jeans Ten White, Blue Jeans LC1 ICs.

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    Part of the sound equation is the size, shape of the room you are listening in. the smaller the room the less you will notice the difference when going above 5.1. The larger the room the more you will notice the difference when going above 5.1
    In my situation an approximate 16 x 14 room with vaulted ceilings each addition of speakers just kept enveloping me more into the movie.
    Panasonic PT AE7000U Projector, Denon 4520CI Receiver, Polk CSi A6 Center, Polk RTI A5 Fronts, Polk Tsi 400 Front Wides, Polk Fxi A6 Sides, Polk RTi A3 Rear, PS3, 100" Apex Cinewhite screen.

    Phil

  19. #19

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    the avr should send separate signal to each channel. That said, it depends on the source as well. If the audio source does not have that kind of format, then most likely, it will not go though all the channels. Just like some feedback on this post, running the auto calibration would certainly help.

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