[mythtv-users] myth 0.24 cannot get sound on one channel

Seth Daniel mythtv.org at sethdaniel.org
Tue Dec 7 18:35:50 UTC 2010

On Sun, Dec 05, 2010 at 01:21:16PM -0800, Seth Daniel wrote:
> Hi,
> I am unable to get sound to playback for one channel.  All other
> channels work fine.  The channel is KCOP (channel 13) here in Los
> Angeles.  I don't know if this channel worked with any version previous
> to myth 0.24 since, until very recently, I was unable to tune this
> channel (OTA).
> I have one other weird sound problem with channel 11 (KTTV).  Initially
> I don't get sound, but if I skip forward several minutes I get sound.  I
> can then skip back to the beginning and sound playback is fine.  Perhaps
> an interesting tidbit is that KTTV and KCOP are related.  I think FOX
> owns both of them.
> I have attached a log when I attempt to play something from KCOP.  I
> used -v audio.  I don't see anything interesting, but I don't know what
> to look for either.  In the log I am using LiveTV, but recorded shows
> don't work either.  Also in the log I am using the ALSA:default output 
> device which I manully entered in the sound setup screen.  Since then I 
> have changed to using ALSA:iec958:CARD=CMI9738,DEV=0 as the output
> device (this is a device found during the audio device scan) and the
> same problem persists.  My other sound settings:
>   speaker config: 5.1
>   AC3 / DTS passthrough checked
>   upmix quality: 0

Apparently KCOP broadcasts are all in stereo instead of DD.  So I had to
change the upmix quality to something other than zero and turn on 'upmix
stereo to 5.1'.  Once I did that KCOP now has sound during playback.

seth /\ sethdaniel.org

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