Film-Tech Forum ARCHIVE: Surround problem

This is topic Surround problem in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Hakan Bicer (Member # 7471) on 07-21-2014, 10:03 AM:

hi all

Sony SRX 515 projector and server

Dolby CP650 installed cat 790

surround output very choppy

How can I solve the problem

Posted by Carsten Kurz (Member # 5396) on 07-21-2014, 10:12 AM:

search the forum for 'robosound'.

- Carsten

Posted by Mike Moreno (Member # 4887) on 07-26-2014, 02:23 PM:

maybe youn need to install an oddissey card on the cp650 audio output.
it has special filters that make them work as they have to.

mike moreno
mexico

Posted by Marco Giustini (Member # 4544) on 07-26-2014, 03:39 PM:

maybe on the input, but we will need to get a better description of what the problem is to advise

Posted by Carsten Kurz (Member # 5396) on 07-27-2014, 08:33 AM:

The Sony has both balanced and unbalanced AES outputs on separate connectors. The CAT790 may work better if you use the unbalanced output. So, try to make a separate cable for the corresponding inputs on the CAT790. There is a document describing the weird input port assignment of the CAT790 here:

http://outty.org/Content/CinemaTech/Dolby/CP650/Cat.%20No.790%20Installation%20Instructions.pdf

From your thin description I guess it's the dreaded robosound issue. But with a modified cable, it could potentially even cure that issue, or make it happen less often.

- Carsten