[mythtv-users] Issue - MythtvFrontend Nvidia Shield Audio Pass fuzz

Jon Boehm jon.s.boehm at gmail.com
Sat Jan 5 02:29:45 UTC 2019


Peter -- Please add the following Nvidia Shield Setting to your Digital
pass through documentation.  You might label it as optional if people have
problems locking the correct codec.  The problem may be exclusive to older

Michael, John, Tim, James - All of you have talked about audio problems
recently with the Nvidia Shield in this or parallel threads.  Investigate
the feature below.  It might solve your problem.

I've solved my issue with my older receiver not locking on to the correct
audio codec when starting a new recording and sometime after a commercial
skip in the middle of a recording.  In these instances I get no audio other
people have report similar odd behavior.  A pause/play or a skip fixes the
issue but its very annoying.   After turning off the following Nvidia
Shield Setting (not in Mythtv) everything is working correctly.   Note that
the very first time using MythTV after the change I got odd behavior.  You
might need to restart MythTV or even the Nvidia Shield.

settings -> Display and Sound -> Advanced -> Play comfort noise on HDMI ->

Use this option to en/dis playback of inaudible comfort noise on HDMI when
no audio is present

Not really sure what the setting does but turning it off fixed my issue.
There must be something non-standard with the way MythTV integrates with
Nvidia Shield audio that causes issues.  No other apps I've used have had

Hope this helps others,

On Sun, Dec 2, 2018 at 10:20 AM Jon Boehm <jon.s.boehm at gmail.com> wrote:

> Yes I agree because it’s the first thing I tried while debugging, but
> other apps can do passthrough with the fixes volume turned off.
> Used it to watch SNL last night.  About every other commercial skip it
> failed to sync and I had to pause/play.
> Love the app
> Jon
> On Sun, Dec 2, 2018 at 8:32 AM Peter Bennett <pb.mythtv at gmail.com> wrote:
>> On 12/1/18 9:34 PM, Jon Boehm wrote:
>> Peter, yes I confirmed those settings.  They where in the correct
>> configuration before I started messing with things today.  By themselves
>> they didn't improve my situation.
>> However, GOOD NEWS, when I selected
>> Android setting -> Display and Sound -> Advanced -> Fixed volume   ON
>> To me this was obvious because volume control does not work with pass
>> through. When writing the instructions I did not remember that I had done
>> this. I will update the instructions. Thanks for pointing it out.
>> Then I'm in Michael's situation.  I start playback and my receiver misses
>> the stream type.  BUT no more fuzz, just silence.  That's a big
>> improvement.  Then I play / pause and I'm of to the races, full
>> DolbyDigital passthrough.  For now this is very usable.  Just have to
>> educate my family.
>> Let me know if you need help debugging this further.  I'm happy to help.
>> Jon
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