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

[John P Poet]

On Sat, Dec 1, 2018 at 7:36 PM Jon Boehm <jon.s.boehm at gmail.com> 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
>
> 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
>
> On Sat, Dec 1, 2018 at 3:08 PM John Pilkington <johnpilk222 at gmail.com>
> wrote:
>
>> On 01/12/2018 22:36, Michael wrote:
>> > On 12/1/18 2:45 PM, Peter Bennett wrote:
>> >>
>> >>
>> >> On 12/1/18 3:31 PM, Jon Boehm wrote:
>> >>> Hi,
>> >>>
>> >>> Love the Android MythtvFrontend.  Thankyou!!!!
>> >>>
>> >>> But I'm having an issue and don't see how I file issues on the git
>> >>> page so I'm posting here.
>> >>>
>> >>> First the good -- I can get analog audio just fine.
>> >>>
>> >>> Problem - As soon as I enable and Digital Audio Capabilities (pass
>> >>> through) my receiver does not recognize the digital audio stream and
>> >>> never switches from the analog mode to digital codex.  All I get is a
>> >>> harsh fuzz from the speakers.   I've seen this behavior on rare
>> >>> occurrences with Kodi or a BluRay.  Stopping playback and restarting
>> >>> fixes the problem but that doesn't help here.  Every digital stream
>> >>> is corrupted.  If I play an old analog recording when passthrough is
>> >>> enabled that works just fine.
>> >>>
>> >>> This is on a fresh install of
>> >>> mythfrontend-20181124-arm64-v30-Pre-983-gca71c59e61a.apk
>> >>> <
>> https://dl.bintray.com/bennettpeter/generic/mythtv_30/android_64/:mythfrontend-20181124-arm64-v30-Pre-983-gca71c59e61a.apk> with
>>
>> >>> a v29 backend.  If it matters this is using my Onkyo TX-SR805.  Its
>> >>> not the newest receiver but its new enough to support DTS-HS and
>> >>> DD-TrueHD.
>> >>>
>> >>> Thanks.  I really really appreciate the mythfrontend for Android.
>> >>>
>> >>>
>> >> Did you enable digital audio in Android settings as described in the
>> wiki?
>> >>
>> >> https://www.mythtv.org/wiki/Android#Digital_Audio
>> >
>> >
>> > I just walked through these on my system and it is exactly what I have
>> > for Audio.   I went ahead an implimented the video settings as well
>> just
>> > to make sure I had the right configuration but I am still getting a
>> > similar audio issue described above - except I can get it to work by
>> > pausing/fast forwarding.
>> >
>> >
>> > Michael
>>
>> I see something that just might be related on my main system (and not
>> tied to Android) when I record  a program near start-of-service on a
>> part-time channel.  The audiooutput graph in the editor then sometimes
>> shows data that is clearly not audio in its audio buffer, and I have had
>> segfaults then.  I first saw this years ago and used to delay the start
>> of recording until the stream-format information was more likely to
>> match reality;  now that doesn't seem essential, but it does go wrong
>> occasionally.
>>
>> ffmpeg  and mythffmpeg sometimes gave different results too, depending
>> on exactly when they take their samples for stream analysis.
>>
>> John P
>>
>
I was also having this issue, but it seems to have been solved for me by
updating the firmware on my preamp.  So, it seems that just the right
settings and components are necessary.

John
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