[mythtv-users] [renamed] Audio problem on Shield
Peter Bennett
pb.mythtv at gmail.com
Thu Apr 9 17:56:12 UTC 2020
On 4/9/20 10:47 AM, Peter Bennett wrote:
>
>
> On 4/8/20 8:41 PM, Michael wrote:
>> On 5/17/19 1:10 PM, Peter Bennett wrote:
>>>
>>>
>>> On 5/17/19 12:04 PM, mythtv wrote:
>>>> I tried one of the latest android builds from the ticket. I can
>>>> actually get audio now, but only stereo. When I try to play a movie
>>>> with digital audio, it seems to want to convert everything to LPCM
>>>> stereo. That's what my receiver says its receiving.
>>>
>>> Did you follow the instructions in the ticket?
>>>
>>> https://code.mythtv.org/trac/ticket/13446#comment:5
>>>
>>> See "To use AudioTrack on Android" in the comment
>>
>>
>> Hi Peter, I am finally updating to version 31 this week and had saved
>> this thread for when I was able to do the upgrade. In the notes of
>> the ticket you noted:
>>
>>
>> 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
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