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Author
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Topic: Connecting DVD to CP-55
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Neil Chue Hong
Film Handler
Posts: 19
From: Edinburgh, Scotland, UK
Registered: Nov 2000
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posted 10-08-2001 08:15 AM
Hi,a couple of quick questions... I'd like to connect a DVD player to our Dolby CP-55 (with SRA-5) so that the sound from the player is processed through the matrix. Q1) Will this work? (is there a difference in the matrix between Dolby on DVDs, and Dolby on film?) Q2) Where do I connect it? The non-sync L/R input appears not to process the sound - should it? From the manuals, it appears that the aux input requires a separate processor to split it into L/C/R/S first. Over to the experts!
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 10-08-2001 09:21 AM
Though I haven't had to do such a thing yet...
On a CP-55 with an SRA-5 SR adapter...presumming you have installed it the current method (the SRA-5 connects to the DT inputs on the backplane of the CP-55 and format 03's button is now the format 05 (SR)) I would have the DVD player come in through the SRA-5's Non-Sync inputs and switch the SRA-5 between Non-Sync and film...you will need to select "SR" still to have the CP-55 look at the SRA-5 as the source but otherwise it should work...watch your levels though.
Steve ------------------
"Old projectionists never die, they just changeover!"
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Pete Naples
Phenomenal Film Handler
Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001
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posted 10-08-2001 02:48 PM
Steve, I have recently done exactly this in two screens at a local cinema and it works a treat.
Connect the DVD O/P to the non-sync L-R I/P on the SRA5. I fitted a little toggle switch to switch the SRA5 into non-sync and out of SR. Had to turn the non-sync level pot full up to get any sensible output level.
I set the DVD players audio output to 'Dolby Digital 2 channel", which is Pro-Logic, it really does sound quite nice.Neil, when did EUFS get Dolby?? Why didn't I install it??? Hmmm??? Support your local engineer! Michael, I think you have your terminology a little confused. The CP55 is 4.1, more commonly known as Dolby Stereo, in it's native state it decodes L,C,R with or without surround, with A type noise reduction. With the addition of an SRA5 it can decode Dolby SR prints. The best way to connect the SRA5 involves some backplane mods and re-programming the 03 Dolby Stero Without Surround button to be 05 Dolby SR. With the DVD player I set it's output to be 2 channel, which is Pro-Logic encoded. To all intents and purposes this is the same as as the optical sound track after it's been processed by the NR modules.
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Pete Naples
Phenomenal Film Handler
Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001
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posted 12-02-2001 04:38 PM
Ayuppers!Cinema Processors are just that, CINEMA processors, with all the features and facilities designed for professional cinema use. Domestic processors are just that, DOMESTIC! I once made the mistake of getting involved with a cinema that was having a sound system installed with a domestic pro-logic unit at it's heart. The equipment had been sold to them by a stage equipment supply company, and when they started to have problems I got involved. First problem, the cell didn't like the pre-amps they used, two brands of pre-amps later and we got usable signal, second hassle, the surround delay on the processor wasn't long enough for the theatre (being much larger than the average sitting room), install an outboard delay unit, and we get round that one. No on board eq', so three graphis eq's were banged in. After all that it sounded, well mediocre, and between what the client had originally spent plus getting me involved, they might as well have bought the real thing in the first place. It's all now about to be replaced with an Ultra Stereo. If I ever get the chance to go down that road again I don't think I'll bother.
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