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Author Topic: 7.1SDS Content? Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 11-03-2014 11:42 AM                        SMPTE 428-12-2013 provides a standard soundfield group list. These are 5.1, 7.1DS (rear surrounds), 7.1SDS (no rear surrounds, but Lc/Rc), 6.1 (includes center surround), and 1.0 (mono through center speaker). Is any content currently shipping with 7.1SDS? Thanks! Harold  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-03-2014 01:05 PM                     None that I've found but I'm definitely looking. I've been very disappointed with 5.1 mixdowns of what should be 7.1SDS tracks (Todd AO). For instance, the Oklahoma! DCP should have been a 7.1SDS but was issued in 5.1.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 11-03-2014 07:35 PM                     Agreed that 5.1 reissues of 70mm features that should have 5 screen channels leaves two big holes in the soundfield. How big a market is there? Are there many screens with the Le and Re channels - and wide enough to really show them off? Producing a VF for this wouldn't be cheap, but (I think) less effort and cost than remixing to 5.1.  |  IP: Logged Marcel Birgelen Film God Posts: 3357 From: Maastricht, Limburg, Netherlands Registered: Feb 2012 posted 11-04-2014 02:59 AM                     The lack of 7.1 SDS mixes probably even didn't motivate many of those SDDS converted houses with 5 stage channels to keep those speakers wired. It's disappointing that even Dolby Atmos designates those two extra front speakers as optional. What use is it to have the best possible accuracy everywhere but there were it matters most? Auro3D does add three extra stage channels, but they're height channels, so no use either...  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-04-2014 06:27 AM                     I would think to have a VF file for 7.1SDS would actually be relatively cheap because it is already mixed that way...the cost would have been in creating the 5.1...which they would need to do for the valuable video release for the home. There are a fair number of a 5-screen channel theatres out there still. And those that are likely to play classic 70mm titles are going to raise those odds a bit.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 11-04-2014 10:38 AM                     Steve, are those theatre ready to play 7.1SDS content or would they need to upgrade/rewire?  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-04-2014 11:02 AM                     I can't speak to all of them...I can only speak to the ones we directly have contact with and the answer is YES! If the theatre had 5-screen channels before, they still do now and we ensured that those would be supported going forward. For instance, the AFI/Silver has two screens with 5-screen channels (one was to support SDDS-8 as well as narrower aspect ratios so that Left and Right were not beyond the image). Both of those theatres fully support 7.1SDS without any rewire or effort. It is just a preset for them. The format that has taken some off guard is actually this 2.0 Lt/Rt business. Almost no processors support it out of the box. The CP750 being a notable exception. Yes, you can "create" something with one or two of the others but it is typically a lame L+R, L-R sort of "decode" rather than a proper pro-logic type steered sound.  |  IP: Logged Daniel Schulz Master Film Handler Posts: 387 From: Los Angeles, CA USA Registered: Sep 2003 posted 11-04-2014 11:17 AM                        I wish I had a time machine, so we could have set the D-Cinema standard to be 9.1 (5 screen channels + 4 surrounds), with a requirement that the server be able to downmix to 7.1 or 5.1. There there could have still been a single DCP inventory, with confidence that the soundtrack would play back appropriately.  |  IP: Logged Ian Freer Expert Film Handler Posts: 135 From: Wellington, New Zealand Registered: Oct 2003 posted 11-05-2014 09:55 AM                     The Datasat AP20 supports 2.0 LtRt matrix decoding out of the box too I believe.  |  IP: Logged

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