[mythtv-users] pi2 audio issues

[Peter Bennett]

On 07/30/2018 08:22 PM, Michael Drons wrote:
> running .29 latest as of a couple of days ago (details below).     But 
> it does not seem to matter as I have been updating for months and 
> still have the same issues.
>
> Theses are the issues I see in the log
>
> 2018-07-27 20:55:58.135339 I [686/938] AudioOutputBase 
> audio/audiooutputbase.cpp:1706 (OutputAudioLoop) - AOBase: 
> OutputAudioLoop: Play Event
> 2018-07-27 20:56:11.150235 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:16.106402 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:20.685351 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:21.776916 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:22.451189 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:23.186836 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
> 2018-07-27 20:56:24.599191 I [686/938] AudioOutputBase 
> audio/audiooutputalsa.cpp:592 (WriteAudio) - ALSA: WriteAudio: buffer 
> underrun
>
>
> When I see these the recording sounds horrible and the audio is dropped.
>
>
> Any ideas on how to fix, troubleshoot these issues?  The recordings 
> are good, because they play fine on a laptop with VLC.
>
in 0.29 Frontend setup has a setting "Extra audio buffering". Does 
turning that on or off make a difference?

In 30 (master) that checkbox is changed to a number of milliseconds of 
extra buffer you can choose. The old "Extra Audio Buffering" is equal to 
a setting of 100ms.

If you go into the playback audio sync, and adjust it, does the audio 
sound good ignoring the fact that lip-sync will be wrong? If so, then 
using version 30 and adjusting the extra audio buffering higher will 
solve it.

v30 frontend as of today will work with a v29 backend. This is not 
always the case. You could uninstall v29 mythtv-light and then install 
the v30 mythtv-light.

Peter

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