[mythtv-users] Digital audio: centre channel drops out intermittently

Nick Rout nick.rout at gmail.com
Fri Jan 27 03:22:04 UTC 2012


On Fri, Jan 27, 2012 at 1:36 PM, Dave Badia <dbadia at gmail.com> wrote:
> Here's the latest on my side: when the audio dropout occurs, the
> receiver still shows that it's receiving an 5.1 signal, so it looks
> like there's only 2 channels of audio being included in the 5.1 stream
> (not sure about the surround channels as there's nothing there even
> when the center ch sound is present).  Given that, and the fact that I
> don't have this problem with any other material except this news
> broadcast, I suspect it's an issue with my affiliate's
> encoding/retransmission of the broadcast.  This seems even more likely
> since it tends to happen right after commercials in which the local
> affiliate is mixing in the local commercials.  I posted to the OTA
> thread for my region over on AVS forum to see if any another have the
> same issue.  Emailing the station engineers is a good idea, I'm going
> to do that as well
>
> Marc - Have you tried replacing your optical/coax cable?  Sounds like
> sometimes it's very reproducible for you, but other times not.  I
> wonder if there is a combination of broadcast issues during Family guy
> and a bad cable the rest of the time resulting in random dropouts in
> other shows.
>
> IMHO the sound card or the amp would be the least likely suspects
> since they are mostly solid state... typically they either work or
> they don't, as opposed to sometimes yes and sometimes no.

I seem to recall being able to import a 5.1 ac3 file into audacity,
which might show what is going on.


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