[mythtv] Audio distortion issue on Nvidia Shield

Michael mythtv at blandford.net
Mon Sep 24 20:09:17 UTC 2018


On 9/24/18 9:55 AM, Peter Bennett wrote:
>
>
> On 09/23/2018 10:41 PM, Michael wrote:
>> Hi Peter,
>>
>>
>> I spent some time playing with this tonight.   I tried all of the 
>> settings you mentioned about and I still am having the crackly sound 
>> from the center regardless of what speaker is actually playing the 
>> the start of a video or after seeking forward.
>>
> So it is ok most of the time, only gets static when starting or 
> seeking? How long does the static last?
>
> I have noticed with digital audio, the sound does not start up 
> immediately after a seek forward, there is sometimes a second of 
> delay. Perhaps my sound system is able to ignore the beginning part of 
> the audio that yours is having trouble with.
> Does this happen with pass through from a computer other than the shield?


Hi Peter,


Its more of an electronic screeching noise than static.   I could record 
a short clip of it if you want to see it/hear it.


It happens about 75% of the time when starting a video or if I fast 
forward (including commercial skip).    I have waited for 5-10 seconds 
to see if it will go away but it doesn't.   A quick rewind makes it go 
away 100% of the time.  It is annoying enough, we have started watching 
commercials to avoid the sound.


Prior to the shield, I had a computer running MiniMyth2 and never saw 
this issue.   I also didn't see this with the android packages on the 
shield until just about ~10 days ago.   As I mentioned, the issue 
appeared without any update to the mythtv package on the machine.   It 
was the older August package.    In the interim, there was the Shield 
7.1 update.  Then I updated to your Sept. package in hopes of a fix, but 
it continues to exist.


> The update I was referring to was the 7.1 update.   I applied it 
> around 7-10 days ago which is about the time this started. 
> Unfortunately, I can't say for certain thats when it started, but its 
> the only thing I can think of that changed.


How can I get the logs with adb?   I thought you had sent me a note 
previously, but I am not finding it now.


Also, any thoughts on why the other pass through audio modes like EAC3, 
TrueHD, etc are not even selectable?   Are those not supported on the 
Shield?  When I try to scroll down to them, the menu just wraps between 
Dobly and DTS and won't go down that far.


Michael



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