|
This topic comprises 2 pages: 1 2
|
Author
|
Topic: DTS Setup Disc Q's
|
|
|
|
|
|
|
|
|
|
|
Steve Guttag
We forgot the crackers Gromit!!!
![](http://www.film-tech.com/ubbmembers/268e.gif)
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
|
posted 04-28-2009 05:17 PM
Sorry Tony...you are most certainly wrong on this one. Using the tones on the disc...300mV in a Dolby cinema processor or any other processor that is designed to accept the Dolby DA10/20 processor is the only correct way. If you use an SPL meter...I can all but guarantee that you won't have a properly balanced system from format to format.
If you get your levels right with the tones, you will have a very precise balance between analog and digital...done it many, many, many times.
The bottom line...don't try to fix B-chain problems with A-chain devices.
Joe, the reason for the adjustment with DTS has to do with when DTS first came out...there was no standard on Aux inputs...and many aux inputs had to be created, somehow. Ultra Stereo, for instance, referenced .775V (0dBu) rather than 300mV (-8.2dBu).
Note, starting with the XD10, DTS now references their output in dB with 0dB equalling 300mV reference...thus most can just install them right out of the box...adjustments are still available to suit other situations.
Steve
| IP: Logged
|
|
Mike B. Smith
Film Handler
Posts: 82
From: Universal City
Registered: Nov 2004
|
posted 04-28-2009 06:45 PM
Thanks Steve well said, Gordon gets a thumbs up too. The most current test disc is the DS 5, however the DS 3 can be used to set levels. On the DTS-6D once the disc starts to play you can push the index switch to fast forward to track 2 which has the 1K tone, it will play for about a minute before going to the next track. For continuous play, set the offset switches to 02 after the disc starts to play, don’t forget to reset switches back to the original calculated settings when done. DTS does recommend setting to 300mV using 1K, the DTS is an A-chain device as Steve stated, most Cinema Processor 6 track inputs are 300mV, so if the B-chain of the processor has been set correctly, the DTS levels should be good, however their may be some exceptions but rarely. Also to defend Tony’s statements, some manuals have stated using the SPL method, it can be done that way but using the 1K method is much more accurate. Since DTS does recommend this type of calibration we have created a test card that will help speed this process up. You plug the audio out from the DTS to this card, attach your volt meter to the card as well, run the disc adjust to 300mV and you’re done. Two types of these test cards are available; one is the E313-01 the other is E313-00. The difference, one has a rotary switch to select channels, the other you must move your meter probe to each channel. There is a DTS tech notice “TN-E392” which explains it all, and can be found on the DTS web site if your lucky. Also for a limited time, while supplies last, (I have quite a few) contact me with your mailing address and I’ll send you one of these test boards with instructions at no charge.
| IP: Logged
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
This topic comprises 2 pages: 1 2
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion
and agrees to release the authors from any and all liability.
|