Originally Posted by HiDefbg
Makes sense that only the Front Presence speaker jacks are active when Amp Assign is set for 5.1.2, as you're telling the unit you're not using two amp channels. But what if you set Amp Assign for 5.2.4, but connect rear presence speakers to "EXTRA SP 2" terminals while leaving the "EXTRA SP 1" unused?
Regardless, what dstewart51
could definitely try is this experiment:
Set up a Pattern 2 configuration for Amp Assign of 5.1.2, and re-connect his rear surrounds into the Front Presence speaker jacks. Next, set Presence Speaker Layout to Front wall presence speakers, as that is where his rear presence speakers are hooked up to. Then run YPAO with Angle Measurements.
The idea is to get height info into the his 2080 so a Dolby Atmos stream will send height sound to his measured rear "heights." It doesn't really matter that the heights are not ideally located. The operating premise is: Any height info is better than no height info at all!
can easily A/B test such a set up by downloading LEAF, or any other good Dolby Atmos material and play it back with both his Pattern 1 (7.2), and his Pattern 2 (5.2.2). Then decide which sounds better!
Importantly, from looking at dstewart51's great pics, it doesn't look like front up-firing Atmos Enabled speakers would even work in his environment, what with those irregular ceilings. And most importantly, why waste the 2080's ability to process and take advantage of the Dolby Atmos carnival ride?
I'm not sure you understand that ATMOS height meta data is embedded in the core 7.1 TrueHD Bit Stream. ATMOS is Not a separate audio track.
All the ATMOS decoder does is extract flagged "height" content from the core Bed Layer (ear level) speakers and moves it up to the Height speakers.
It's the separation between ear level speakers and height speakers that creates the "Bubble" around and above you for correct object placement.
has his Back Surround speakers mounted high, there is nothing to be gained because
nothing is going to be relocated/extracted that normally would be there anyway in the core 7.1 track.
And a 5.1.4 amp assignment with only 2 presence speaker wired would potentially throw away half the intended height audio.
Not a good idea when you've already dismissed the back surround channels and replaced them with Front Height effects from the Front L/C/R speakers
The correct assignment would be 7.1.2 with the Front Presence jacks used as the only pair and configured as Overhead. Let YPAO do its thing.
When an object circles my 7.1.4 room in an ATMOS demo, there is no way Front Height specific meta data is going to be placed correctly in my space
if my Front Height speakers were relocated to sit high on my Rear wall (where my Rear Height speakers are) That's just absurd and wrong in every way.
The only way Dstewart51
can get proper Height/ATMOS/DTS:X/3D DSP effects in that space is to move from 7.1 to 5.1.4 by undoing his Bi-Amped Front L/R speakers
and adding 2 Front L/R Height Speakers above his Bay Window, the same way he did the other surrounds. Then wire those high mounted Back Surrounds to his Rear Presence speaker terminals,
Re-Run YPAO (His 9 Channel RX-A2080 can certainly do 5.1.4 without an additional external Amp) and ideally, the side surrounds should be dropped to ear level on stands.
Again, I encourage you to challenge the experts in the ATMOS section if you don't trust what I'm trying to explain to you.
Most of us there are in agreement that 5.1.4 is far superior to 7.1.2 configurations (if you can't accommodate 7.1.4)
But it has to be done correctly and the guidelines are pretty straight forward in regards to speaker placement.