Film-Tech Forum ARCHIVE: Ticking in surround speakers?

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Posted by R. Andrew Diercks (Member # 1725) on 03-31-2005, 02:06 PM:

Last weekend in one of my auditoriums, I had a ticking sound coming from the surround speakers. This was very rhythemic and sounded similar to phase checking, but in a higher pitch.

The sound is Dolby Digital CP500 with a basement reader.

I reset the processor and the sound went away immediately. This has only happened once before. I was just curious what might be the cause. On the monitor the -40 frequency green light was flashing with the ticking noise.

Posted by Ferdinando Innocenti (Member # 2477) on 03-31-2005, 03:07 PM:

Sometimes it happened to me, in my cp500s. The same as you, ticking sound on surround, which goes away resetting the unit. If I remember, it's enough resetting the digital part.

I have never read anything by Dolby about it.

Just curious to know more.

Posted by Pete Naples (Member # 761) on 03-31-2005, 03:32 PM:

Dolby FB220 may be of interest, when I've had odd noises in CP500 surrounds it usually turns out to be our old friend the Cat675A.