|
This topic comprises 2 pages: 1 2
|
Author
|
Topic: Dolby Toning CP45's
|
|
Gavin Lewarne
Master Film Handler
![](/ubbmembers/5397a.jpg)
Posts: 278
From: Plymouth, UK
Registered: Aug 2009
|
posted 09-08-2009 05:12 AM
Actually I do thin with our CP45, but for a very good reason.
For ages i could not figure out why most of the dialog was being sent to Centre + left and we had terribly unbalanced sound in the auditorium. dialog leakage into left + surrounds and virtually nothing from right.
I toned and toned my head off in MONO and A-TYPE (my CP45s manual actually says to do it in A-Type), checkd slit azimuth, focus and pink noise response. everything was as good as it could be. We even called in a service engineer from Sound Associates but even then could not figure it out. Everntually i though, Heck with it, and toned it in SR. ever since, now get balanced sound with dialog correctly being decoded and no surround leakage! If i tone in mono and switch to SR with the loop still running, there is actually very very little difference needed between the modes to get the green's lit evenly. for me, it was just half a turn of the right trim pots. but evidently, that was enough to throw off the decode.
Oh, and check that the input type jumper is set correctly. we have jaxlite XLA-650 preamps in our projectors that have an unbalanced output, but for the years prior to my employment the CP45 had been set to Balanced inputs, leading to huger amounts of crosstalk than you can get even with a badly aligned A-Chain. Once i corrected this to Unbalanced and re-toned in SR, decoding is absolutely spot on. We have even had customers commenting on the quality of our sound compared to the all-new multiplex nearby
| 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.
|