[mythtv-users] audio quality problems in mythtv

[Ken Truesdale]

I've been using MythTV for a while but only recently got the HDMI output
into a receiver with a good 5.1 speaker set up.  The sound is poor and is
particularly noticeable on audio (only) files.  (I think videos may be not
be perfect either but doing A/B comparisons is harder with video so I'll
stick to audio only files for testing for now.  

 

I have been able to simplify the testing by copying a single file from a
factory CD with no transcoding.  I play that file through VLC and it sounds
rich and full and the subwoofer booms nicely.  Ditto just using "aplay".
But using mythavtest produces a thin sound and the subwoofer makes no sound
at all.  I assume the sub's channel is still active but the output is so
weak, it doesn't end up with anything to do.  It's not quite like a clock
radio but too close to it for me to consider it usable for home
entertainment!  

 

I've been playing around with settings in the Audio section of Setup and
haven't been able to effect any change.  I've tried with upconvert to 5.1
and without it.  I've got all the Digital Audio Capabilities checkboxes
checked.  When I do the Test in the audio setup, I can confirm that all 6
speakers emit a test tone.  I haven't played around with any of the Advanced
Audio settings.  

 

There are lots of places that I could still look but I feel like I've
exhausted the obvious and I'm hoping somebody has a suggestion about the
smartest place to start looking from here.  I'm running MythTV 27 running on
Mythbuntu.  V0.27.3-152-g926bb8d.  Thanks!  

 

 

Ken.

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