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Author Topic: Distorted sound in digital I/O AES3, CP650 Mark Barabas Film Handler Posts: 2 From: Pist, Czech Republic Registered: Apr 2011 posted 04-12-2011 04:56 AM                     Hello all, have you ever had experince with distordet sound, which also had some of drop outs in system listed below ? Doremi DCP 2K4 - 4xAES multicable - Dolby CP650 Optional I/O (cat 790 installed). I also build converter from AES to SPDIF, but this didn´t solve the problem. Is it possible that hign AES voltage output could broke input parts of Cat 790 ? There is also some cracking and sizzeling noise in particularry surround channels.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-12-2011 05:34 AM                     I don't remember wether it was a 650, but I do remember that one Dolby processor once created strange sounds due to a broken firmware for EQ. If everything else fails, you might consider upgrading or reflashing the firmware. - Carsten  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 04-12-2011 05:07 PM                     Output of Doremi - 110 Ohm Balanced. Input of CP650 -75 Ohm UnBalanced. You need to be very careful to do this succesfully. Really there should be transformers between the Doremi and the CP650. For example web page  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-12-2011 07:35 PM                     Or get the Odyssey Products Option AES board...it has the transformers on it and has the traditional DB25 balanced AES input (it also replicates the CP650 I/O connector for any of your existing (surround) wiring. -Steve  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 04-12-2011 07:53 PM                     I second Steve on the Odyssey board, it works great!!  |  IP: Logged Mark Barabas Film Handler Posts: 2 From: Pist, Czech Republic Registered: Apr 2011 posted 04-13-2011 03:53 AM                     Many thanks for all of you guys. I will try update firmware, but I think it won´t help because all other sources works fine. I will also try transformer converter, because Iused only voltage divider with resistors. I will let you know where probles was.  |  IP: Logged

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