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Author Topic: CP750 Sorround Ex
Annli Com
Expert Film Handler

Posts: 140
From: ShibuPaul-India
Registered: May 2014


 - posted 01-24-2015 08:57 AM      Profile for Annli Com   Author's Homepage   Email Annli Com   Send New Private Message       Edit/Delete Post 
Dear All
My Samll Doubts The PCM 5.1 Discrete and Dolby Sorround Exx Is Same Outputs in Cp 750 Processor ?
Which Format For Good in 5.1 Movies In Dolby CP 750 ,Our Theatres 7.1 Speaker System. Kindly Advice Me

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 01-24-2015 10:51 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
EX never really made it into DCinema. The CP750 can certainly decode it but I don't recall any DCinema movies so encoded (6.1). Run 5.1 movies in 5.1 and 7.1 movies in 7.1. The CP750 will have the correct sound coming from the various speakers.

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Dave Macaulay
Film God

Posts: 2321
From: Toronto, Canada
Registered: Apr 2001


 - posted 01-24-2015 12:00 PM      Profile for Dave Macaulay   Email Dave Macaulay   Send New Private Message       Edit/Delete Post 
I didn't know a CP750 could handle EX, but I haven't heard of any encoded content either.
The CP750 5.1 mode sends SL to the SL and BSL outputs, same idea with right. Using the 7.1 mode uses four discrete surround channels. The source for BSL and BSR is channels 7 and 8, AES pair 4 on the CP750 Dig1 4xAES digital input. pair 4 is officially the HI/VI audio on a DCP so you have to do something to move the server output AES pair 6 (ch 11/12) over to the CP750 pair 4 input.
Of course that may change if SMPTE metadata steered audio routing becomes standard...
Some servers swap channels around for this, Odyssey makes input cards to handle it as well. The Odyssey cards also have an output for the otherwise lost HI/VI audio so you can add a D-A converter and supply it to your patrons.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 01-24-2015 11:50 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
The CP750 will let you use "Digital 2" as the D/A converter for HI/VI-N and send them out the "AUX" outputs. You just need (or should use) a balun to convert the AES3 to AES3-id (110-Ohm balanced to 75-Ohm unbalanced).

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