7.1 Question.... - AVS Forum
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Old 05-02-2013, 07:38 PM - Thread Starter
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Soi just set up my 7.1 with the extra speakers going into the front high area. I have a Marantz SR7007
Thought id test it out, got test signals. Great lets put a movie on.
I put Avengers in (thought this would be a great movie to check) and im getting zero sound out of the front high speakers. Anyone know why?
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Old 05-02-2013, 07:47 PM
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Did you switch on Dolby ProLogic IIz?
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Old 05-02-2013, 07:53 PM - Thread Starter
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ahh thought it would automatically realize i would want that setting. All good now! thnk you!
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Old 05-02-2013, 07:55 PM
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If the Marantz is selecting Dolby True HD, with a bluray disc, then no you will not get the height speakers to play. I believe you need to select something like Pro Logic IIZ. I had the same problem with my Onkyo 1007. It wouldn't play wides or height with a blu ray disc because I had selected Dolby True HD as the prefered sound field on blu ray. I could be wrong, but it wouldnt hurt to try changing the sound processing to see what happens. Oops! someone beat me to it.

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Old 05-02-2013, 07:55 PM - Thread Starter
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I chose True HD + PLIIz

there is another setting

True HD + A-DSX (height)

is that any good? compared to the PLIIz
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Old 05-02-2013, 07:59 PM
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Cant really give you advise one that one because the Onkyo doesnt offer it. Give them both a shot and see what you preffer. Glad you got your problem resolved. Now get off the forum and enjoy your new set up!biggrin.gif
\
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Old 05-02-2013, 08:28 PM - Thread Starter
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i love it, definitely feels like im now surrounded in sound.
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Old 05-02-2013, 08:32 PM - Thread Starter
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So i came across this site

http://www.blu-raystats.com/Stats/Stats.php

it lets you know which are 7.1 and which arent. I didnt see Avengers on there for 7.1, but i do see Finding Nemo, I now have Dolby True HD + PLIIz set but would i be better just using True HD for a movie like Finding Nemo that does support 7.1 and not the PLIIz setting?
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Old 05-02-2013, 10:16 PM
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Quote:
Originally Posted by amairphoto View Post

True HD + A-DSX (height)

is that any good? compared to the PLIIz
Listen to them both and decide which you prefer. Just so you know how they work: PLIIz extracts ambience from the surround channels to feed the height speakers; by comparison, DSX generates early reflections (that weren't in the soundtrack) to feed the heights.
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Originally Posted by amairphoto View Post

I now have Dolby True HD + PLIIz set but would i be better just using True HD for a movie like Finding Nemo that does support 7.1 and not the PLIIz setting?
The list of movies with 7.1 channels are all 5.1 + 2 rears; none of those 7.1 soundtracks are 5.1 + 2 heights. The only way you'll get all 7 of your speakers to light up is to use PLIIz processing.

Sanjay
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Old 05-04-2013, 09:10 PM - Thread Starter
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Quote:
Originally Posted by sdurani View Post

Listen to them both and decide which you prefer. Just so you know how they work: PLIIz extracts ambience from the surround channels to feed the height speakers; by comparison, DSX generates early reflections (that weren't in the soundtrack) to feed the heights.
The list of movies with 7.1 channels are all 5.1 + 2 rears; none of those 7.1 soundtracks are 5.1 + 2 heights. The only way you'll get all 7 of your speakers to light up is to use PLIIz processing.

Could you elaborate on this please, i dont quite understand how it generates something that is not there....
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Old 05-04-2013, 11:40 PM
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Quote:
Originally Posted by amairphoto View Post

i dont quite understand how it generates something that is not there....
Ever play with the reverb knob on a karaoke machine? That reverb wasn't in the recording (otherwise you wouldn't be able to adjust it).

Same basic concept, more sophisticated processing, and you can simulate a few of the early reflections from a concert hall or jazz club. And that's essentially what Yamaha DSP and Audyssey DSX do: room simulation (give you the impression of being in a larger space).

You can hear it for yourself without extra speakers IF your receiver has any of those Hall or Stadium or Club modes.

Sanjay
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Old 05-04-2013, 11:43 PM - Thread Starter
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ahi see. I think i prefer the PLIIz setting, the DSX one sounds a bit echoey.
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Old 05-04-2013, 11:52 PM
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OK, seems you can already tell the difference between extracting ambience and generating ambience.

Sanjay
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