Film-Tech Forum ARCHIVE: Odd Digital Sound Problem

This is topic Odd Digital Sound Problem in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Martin McCaffery (Member # 37) on 06-14-2014, 09:14 PM:

We are running 35mm this week with digital trailers. Tonight for the first show, the trailers were distorted, sounding like a torn speaker cone in the center channel and there was a tinging, like someone hitting a high tension wire with a hammer. When we switched to 35mm, everything was fine.
Not knowing what else, I did the usual. Reboot. Sounded fine for the second show.
Solaria One and CP650.
Anyone run into this before?

Posted by Monte L Fullmer (Member # 2797) on 06-14-2014, 10:20 PM:

Wait until you're about three/quarters into a digital presentation and the image begins to play intermittently and you pause the content, back it up a few minutes and continue.

It plays fine and then begin to do the intermittent play and even image skipping.

You finally have to surrender: You stop the performance, power down the server and projector (since the projector contains the IMB, which that needs rebooting also), wait for a few seconds then power the projector back on, then power back up the server on so you can return to the section when the problem began-which then the performance runs normally and is good from then on with the subsequent scheduled performances?

And you have a full house of 300 plus when this happens and two days before, I did the regular location reboots to prevent this issue from happening in the first place. Go figure on this one.

Welcome to digital! Ain't it grand? Film never had this issue!

(We can thank DCIP for all of this malarky)

Good luck

-Monte

Posted by Steve Guttag (Member # 268) on 06-15-2014, 09:14 AM:

I'm going with the CP650 on this one...Its "Robosound" on its digital inputs are well known.

Posted by Martin McCaffery (Member # 37) on 06-15-2014, 10:47 AM:

Well, at least I know what Robosound is like now. Really disturbing the first time you hear it.