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Author Topic: Dolby's new sound system Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 11-09-2012 11:05 AM                     Atmos CP850 anounced. Dolby Atmos Processor CP850 & DAC3201  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 11-09-2012 01:31 PM                     Someone explains what they mean with "Dolby commissioning service" please!  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 11-09-2012 02:40 PM                       It means looking at the blueprints, placing the speakers etc., and sending someone qualified to the site to tune, test, and aim speakers to see if it all works properly. Kind of like a modern day THX. The idea is to have the early sites be a credit to Dolby, rather than a mess.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 11-09-2012 03:54 PM                     that's look like a good idea, assuming the "qualified" engineers are actually qualified!  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 11-09-2012 05:36 PM                       I am told that there will be a tech from Dolby Labs sent to the site which would help explain the high price for the hardware.  |  IP: Logged Lyle Romer Phenomenal Film Handler Posts: 1400 From: Davie, FL, USA Registered: May 2002 posted 01-07-2013 07:30 AM                     I was reading the Atmos technical guidelines that Dolby posted and came up with a question. According to the guidelines, EACH INDIVIDUAL surround speaker is supposed to be able to produce 105 dB SPL at the reference position. How can a small surround speaker produce quality sound at that level when stage speakers use huge horns and bass cabinets along with bi or tri amplificatioin to accomplish the same task?  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 01-07-2013 10:51 AM                     Maybe you confuse peak SPL with sensivity (1W/1m). - Carsten  |  IP: Logged David Zylstra Master Film Handler Posts: 432 From: Novi, MI, USA Registered: Mar 2007 posted 01-07-2013 04:16 PM                     I recently completed 3 Atmos installs and per spec each surround speaker is truly supposed to be capable of a peak 105db at the reference position - note that the requirement is peak and not continuous (during setup each individual surround level is set to 85db with some other levels done per array). This is partly why bass management is used for the surrounds - the LF is strengthened to compensate for surrounds that are weak in the LF range (these are not subs for the surrounds, regular bass cabinets work just fine). This is definitely a game changer in selecting surround speakers - many larger auditoriums will need speakers that cost 2-4X what a normal surround does now - in 2 of our auditoriums we completely replaced all the surrounds as part of the install.  |  IP: Logged Jonathan Goeldner Phenomenal Film Handler Posts: 1360 From: Washington, District of Columbia Registered: Jun 2008 posted 01-08-2013 12:02 PM                     I wish I had heard 'Life of Pi' in Atmos because I thought the Atmos mix of 'The Hobbit' was obscenely loud at times - I'm not sure why "REALLY LOUD = State of the art sound" The 'riddles in the dark' scene really was impressive because it was one of the few times it was quiet enough to hear gollum's voice bounce around the auditorium to mesmerizing effect. guess I've gotten to that age where even the trailers which are louder than the feature film is grating and really obnoxious.  |  IP: Logged Mark J. Marshall Film God Posts: 3188 From: New Castle, DE, USA Registered: Aug 2002 posted 01-11-2013 04:12 AM                    All of this is fantastic, but when AMC installs the surrounds in the ceiling, what does that do to the audio presentation?  |  IP: Logged Lyle Romer Phenomenal Film Handler Posts: 1400 From: Davie, FL, USA Registered: May 2002 posted 01-11-2013 07:19 AM                     quote: Mark J. Marshall All of this is fantastic, but when AMC installs the surrounds in the ceiling, what does that do to the audio presentation? Does AMC still do this? I haven't been to the Pleasure Island 24 auditorium that has Atmos since they changed it to ETX but before that the surrounds were on the walls like a normal theatre. Other auditoriums in the complex do have the ceiling surrounds. I can't remember if the 2 big auditoriums with balconies (one of which became the ETX/Atmos auditorium) always had the surrounds on the walls or if they started in ceiling originally and were changed. Regarding your question, since the Atmos technical guidelines specify the location of the surrounds and at least the early installs are being done with Dolby consultants that all installs to date have surrounds placed properly.  |  IP: Logged Jason McMillan Film Handler Posts: 68 From: Houston, TX, USA Registered: Dec 2009 posted 05-21-2013 02:41 PM                     Just wanted to add my $0.02. Just went to the recently opened Santikos Palladium AVX theatre in Richmond, TX. Saw Star Trek in one of the Dolby Atmos theatres. The next day, some different friends and I went to the Studio Movie Grill Copperfield to see Star Trek again. Now, I've always held the sound at SMG Copperfield in high regard.. but seeing it in Atmos one day, then at SMG the next.. while the sound at SMG was very good, it .. well.. just sounded kinda flat compared to the day before. But uhm.. the Korean street tacos were delicious. Santikos invested in six of the Atmos sound systems in just this one theatre... and I think it's ruined every other theatres sound for me for action flicks. It was just like when I was the projectionist at AMC Town and Country 10 back in the day and our engineer came out to install a dts unit for Jurassic Park. I thought our analog CP200 was the baddest boy out there at the time, and that dts unit changed my opinion very quickly. It was that same feeling sitting in that auditorium with Atmos.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 05-21-2013 03:30 PM                     Just last week I was reading through some Dolby tech literature I had in my files from the late 1970's. In one booklet they state "ceiling speakers are never a good idea." I'm guessing they've changed their position on that.. . .  |  IP: Logged Mike Blakesley Film God Posts: 12767 From: Forsyth, Montana Registered: Jun 99 posted 05-21-2013 03:46 PM                        My guess is what they really mean there is "Ceiling speakers are never a good idea if they're playing the same information as the side wall speakers are." Just consider -- if a speaker is playing a door slam or some such sound, you wouldn't want it coming from above... but if you're hearing thunder, then maybe you would.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 05-21-2013 04:02 PM                        So. . . . we have the VOG channel? (Voice of God) Louis  |  IP: Logged

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