![Film-Tech Cinema Systems](http://www.film-tech.com/images/masthead.jpg) |
|
Home
Products
Store
Forum
Warehouse
Contact Us
|
|
|
|
Author
|
Topic: "Robosound" on a CP-750?
|
Jim Cassedy
Phenomenal Film Handler
![](http://www.film-tech.com/ubbmembers/4115a.jpg)
Posts: 1661
From: San Francisco, CA
Registered: Dec 2006
|
posted 08-27-2016 08:43 PM
I got a call from a theater today that they had to cancel a show and move a movie out of their big auditorium due to some strange noises coming out of the surround speakers.
I went down there and there was definitely a lot of distortion and a low 'garbling' sound coming out of the surrounds, especially during one of the trailers that had a lot of surround info.
Surrounds were silent if playback was paused, or when the CP-750 was switched to an analog or non-sync input.
Pink noise & the 'thump track' out of the 750's internal generator were OK too.
Since the noise was especially obvious during one of the trailers, I put that trailer into "loop" mode and the more I listened to it, the more the offending audio began to sound a bit similar to the familiar "robosound" that sometimes happens with a CP-650.
I finally shut EVERYTHING down, including some equipment they usually leave on 24/7. While powered down, I also pulled & re-sat all the digital & analog connections between the (Christie) projector, CP-750 processor, amps, etc.
After this, and a complete re-boot, sound was OK. I 'looped' that trailer and watched it at least a dozen times at higher-than-normal volume. Then re-loaded their playlist for today and watched all their pre-show stuff and the first 20min or so of the feature, and it was OK.
So, I'm not sure what it was- - but as I said, it had more of a 'digtal problem' sound to it than some analog issue. But I've never had a problem with any of the CP-750's I've encountered.
They've had two shows since I did the "repair" earlier today, and all is still good.
Any ideas, anyone? I hate it when I "fix" something and I'm not sure of the exact cause. And, I'm leaving for my annual projection gig at the Telluride Film Festival tomorrow, so I'm hoping whatever I did stays "fixed" for them, at least till I get back.
| IP: Logged
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
|
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.
|
|
|
|