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This topic comprises 2 pages: 1 2
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Author
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Topic: DTS 6D - Cuing pulse
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Scott Norwood
Film God
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Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99
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posted 04-06-2012 03:03 PM
How about this: Disconnect the control line from the DTS box that pulses the processor into digital (leave the other control lines to allow reversion). If you are just using DTS for feature films (and are unconcerned about using it for a mix of trailers or shorts with differing sound formats), this should work fine. You can manually switch the processor to format 10 (or whatever Sony uses) when you want DTS and switch it to 05 when you don't. The problem with this is, of course, if DTS drops out for any reason, it won't pulse the processor back into format 10 when the reader starts picking up timecode again. I wouldn't do it with any other sound format, but DTS tends to be sufficiently reliable that it generally does not drop out during a feature.
Alternatively, as a variation on the above, connect the control line, but have a relay on it between the DTS box and the processor. Have the relay open when you don't want DTS and have it close when you do. This could probably be controlled with an automation system using foil cues on the film or house light settings, but Brad would be the person to ask about that.
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Marco Giustini
Film God
Posts: 2713
From: Reading, UK
Registered: Nov 2007
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posted 04-07-2012 06:15 AM
I had a little fun reading the quick start of the SDDS 3000 manual. As said, I'm not too familiar with the unit. But as I remembered you can use the "sophisticated" fallback structure of the SDDS where the player knows all the time whether the other Digital formats are working or not through an "OK" signal, or you can just short the automation and manually select the formats.
In the former, say you have SDDS-DTS-DD connected. and your fallback is to switch to DTS if SDDS fails and eventually DD if DTS fails. Say your DTS is not working, the processor will fallpack from SDDS to DD, ignoring the DTS. It's the SONY that is handling the fallbacks, not Dolby/DTS.
In the latter, it's like a Dolby processor. You have to select SDDS or DTS with external pulses coming from the digital players - and that could be confusing if multiple cues are received by multiple decoders!
To disable the 'sophisticated' fallback system, you should short pin 34 or 35 (aux 1 or 2) to ground. Possibly you then have to amend the fallback configuration with the setup software. Doing this, you can always select AUX1 and AUX2 from the front panel, regardless the status of their sources.
But, again, someone more skilled with SDDS processors could possibly chime in and confirm that this is correct!
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Bill Duelly
Film Handler
Posts: 92
From: Roselle Park, NJ
Registered: Feb 2006
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posted 04-08-2012 05:02 PM
Thanks for the input guys. I'll try some more tests and see if I can glean any more information.
I found buried in dts literature that after the light goes green on the projector reader, a second later, the digital light, comes on on the player, it then immediately sends the signal to kick over.
Now that I have given this some dep thought, I note that when I change inputs on the front panel, there is some delay, of approx 2 seconds. I wonder if this delay applies to fallback switching.... Also, I think that may be a software setting, as I thought I saw that format change can have a delay put to it. I need to get the special laptop to check that out, as it is not something that is aces able from the front panel.
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