I just
posted about this on SHF (as a reply to a member there who felt the mix is a bit inconsistent with regard to the rears) and thought I’d mention similar thoughts here as well.
On pretty much every song, the rear channels are a combination of isolated information and ambience/reflections from the front-panned instruments (as is the case with most modern surround remixes). What’s interesting is that, in the 7.1 version, the ambience from the fronts and instruments heard solely in the rears are often separated into the different rear speaker pairs.
For instance, in “Star Star”, the ‘normal’ rears just have isolated piano and the extra ‘surround backs’ have the same piano, along with drum and vocal echo. Obviously, this is all being collapsed into a single pair of rear channels when played on a 5.1 setup. Does that mean that any element present in both sets of rear channels is actually being doubled in volume when folded down to 5.1?
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Giles Martin used the same technique on the 7.1 of
Abbey Road. In "She Came In Through The Bathroom Window", the main rears have vocal and drum reflections, while the 'surround backs' have isolated electric guitar. Backing vocals are present in both pairs.
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I noticed the same thing in the 7.1 of “Heartbreaker” - the horns are in both sets of rear channels. So are they actually being heard at too loud a volume on the folded-down 5.1?
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“Dancing With Mr. D.” is one of the more disappointing tracks from a surround perspective and curiously enough, there’s almost nothing in the main pair of rear channels on the 7.1 version. Pretty much all the rear information is in the ‘surround backs’.
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To be clear, I’m not an opponent of Atmos in any way and I enjoyed this release enough to vote an "8" on the poll. I just want to be sure that the downmixing process isn't making what I hear on my 5.1 system drastically different than what they heard in the studio.