[mythtv] Audio distortion issue on Nvidia Shield
mythtv at blandford.net
Wed Nov 21 20:27:52 UTC 2018
On 11/18/18 2:46 PM, Peter Bennett wrote:
> On 11/18/18 4:35 PM, Michael wrote:
>> On 11/13/18 9:06 PM, Michael wrote:
>>> Hi Peter,
>>> I was wondering if you had any other thoughts on the issue I was
>>> having with my shield.
>>> I currently have stereo upmix turned off on the shield. If I play
>>> videos, randomly I get this screeching noise when starting a video
>>> or some times after fast forwarding. Rewinding or pausing for 3-4
>>> seconds often fixes the issue (until a commercial skip, etc ).
>>> Tonight I decided to do a little more testing. I turned on stereo
>>> upmix and I could essentially ONLY get the screeching sound so I
>>> obviously turned that back off. Should it also be off in the
>>> mythtv settings?
>>> I did recently update to the
>>> mythfrontend-20181102-arm64-v30-Pre-921-g35f94663d71 version w/ no
>>> change in behaviour.
>> Just another data point. I bought another Shield TV this week for
>> the loft TV. Very different TV model and same receiver brand ( but
>> different model ).
>> I started with a new fresh profile and am having the same audio
>> issues with this one too.
>> I never had issues with either of these TVs or receivers with the old
>> minimyth2 frontends.
> In Audio setup, under Digital Audio capabilities, do you have anything
> selected? Disable all of the check boxes there (Dolby Digital, etc.).
> Also turn off stereo upconvert and set speaker configuration to Stereo.
I played with variations of those capabilities today. If I enable Dolby
Digital, I get the weird distortion issue. Doesn't seem to matter what
the other options are in terms of generating the noise. Both receivers
support Dolby Digital, so I am not sure what the issue might be.
I also noticed that even though my receivers support EAC3, TrueHD, and
DTS HD, those are not selectable in the MythTV menu. The menu items are
there, but if I scroll up/down, it just cycles between Dolby Digital and
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