[mythtv-users] [renamed] Audio problem on Shield

[Michael]

On 4/9/20 10:56 AM, Peter Bennett wrote:
>
>
>
>>>     To use AudioTrack on Android
>>>
>>> In the Android setup, choose "Automatic" or "Best Available". There 
>>> is no need to force Dolby Digital in Android, it will be used 
>>> automatically if your hardware supports it.
>>>
>>> Select "AudioTrack:" audio device. Enable all entries under "Digital 
>>> Capabilities" and set the appropriate number of speakers. Android 
>>> will detect whether your TV or sound system supports the audio 
>>> format and will either pass it through or decode it within android 
>>> hardware. So for example you can select Dolby Digital even if your 
>>> sound system, TV or display monitor does not support it and android 
>>> will decode it. If you do not select the checkbox, MythTV will 
>>> decode it.
>>>
>>> I have tested Dolby Digital (AC-3). I cannot test multi channel 
>>> LPCM, DTS, E-AC3, etc. If anybody can test these it would be 
>>> appreciated. In particular, testing multi-channel LPCM is needed to 
>>> make sure the channel mapping is correct.
>>>
>>> Let me know if there is any feedback.
>>>
>>>
>>> I configured my shield frontend to have all digital formats and set 
>>> the Shield to auto.   It seemed like all was working until today my 
>>> wife reported a video that has AC-3 audio that wouldn't play any 
>>> sound.  If I uncheck AC-3 in mythtvsetup, I get the audio.  
>>> Additionally, in leanfrontend it plays with audio just fine.
>>>
>>>
>>> According to the manual for my receiver, it does support all of the 
>>> digital audio formats in the mythtv screen.
>>>
>>>
>>> Are these instructions still accurate?  Any thoughts on debugging 
>>> further?
>>>
>>>
>>> Michael
>>>
>>>
>>>
>> I will try this again and let you know. It should work, but later 
>> changes may have introduced a problem.
>>
>> Peter
>
> I just tested on the Shield with mythfrontend V31.0 (same apk as on 
> bintray). I selected "Auto" under surround sound in the Shield Setup. 
> I selected AudioTrack: in MythTV,  selected Dolby Digital and DTS in 
> "Digital Audio Capabilities", selected 5.1 in speaker setup.
>
> AC-3 plays fine, and displays "Dolby Digital" in the audio receiver 
> display.
>
> I found, if I select "Stereo" in the Shield setup and still have Dolby 
> Digital selected in MythTV, that I get no sound, but that is an 
> invalid configuration.
>
> Perhaps your sound system is telling the shield that it does not 
> support ac-3. You could try the "Manual" audio setup in shield setup 
> and select AC-3.
>
> Are you sure you have selected AudioTrack: in MythTV? OpenSles does 
> not support any surround sound formats. Also check the number of 
> speakers setup.
>
> Peter



Hi Peter,


I did confirm that I do have audiotrack selected and 5.1 as my speaker 
setting which matches my setup.    I am ok if my receiver doesn't 
support AC-3 or if it doesn't report it correctly.   I think it is just 
contrary to the note above that says the android device will either pass 
through or decode it for you.


Michael


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