my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Dolby CP 65 Sound Processor advice please. (Page 2)

This topic comprises 2 pages: 1  2

Author Topic: Dolby CP 65 Sound Processor advice please. Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-19-2018 09:25 AM                     The cp 65 is a rock stable processor your Vic 5 already has a dolby digital reader so you would need to aquire a DA20 to decode dolby digital  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 03-19-2018 10:43 AM                        quote: Randy Stankey Nice score on that CP65! Tune it well and it will not disappoint. If the CP65 is the only audio processor in the system (i.e. the outputs from it go straight to the power amps), then maybe. At the last theater I worked that used a pre-CP650 processor (the Egyptian, which used a 200), we had the EQ cards flat, and the tuning done in the processor its output went to (an AP20). The advantage of that route was that only one processor had to be tuned for all the different input sources. Also, on our CP200, some of the potentiometers for the individual bands crackled like mad when they were turned, which was another reason why we were advised by a Dolby tech (don't feel comfortable naming him, but he's forgotten more about CP200s than I ever knew) to leave it flat and do the EQ downstream from it. I know that there is a lot of nostalgia on this forum for CP55s/65s/200s, and I agree that they were very well designed and built machines, but the fact remains that the surviving examples are all now 20-30 years old, with all the maintenance issues that an electronic appliance that old involves. Agreed completely, though, that analog SVA set up with care and empathy can sound very, very nice. quote: Victor Liorentas Dolby Digital is great but your basement reader and worn prints are likely to give you audio drop outs when playing them. I have only ever had that problem on a pair of readers with old and worn-out LEDs. The CP650 setup utility was showing a very low voltage. Once they were replaced, I was getting error rates of 2-4, even with rough old prints. In my experience, SR-D is remarkably resilient for print wear and damage. SDDS, however, absolutely is not. I've also found that as a general rule, platter systems give lower SR-D error rates than reel-to-reel, especially with penthouse readers. The explanation I've heard is that because the feed from a platter is powered (the feed plate is being rotated by a motor), the flow of film is smoother than when it's being pulled by the feed sprocket and relying on inertia for the consistency of the film transport feed. I don't know if that's true or not, but my experience certainly supports this theory.  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 03-19-2018 10:56 AM                     Yes! It's true that a well timed platter can help with error rates. I've even studied a difference from feeding off the bottom platter as compared to the top platter. That slight difference in tension can sometimes change how the reader performs. I've also added tension momentarily by hand and seen the error rate change. Meaning I hold my fingers on the side of the film while watching the error rate instantly change.  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1  2

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

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.