[mythtv-commits] Ticket #12193: OSD & Audio Channels do not change when audio switches from 2.0 to 5.1

[MythTV]

#12193: OSD & Audio Channels do not change when audio switches from 2.0 to 5.1
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 Reporter:  JohnLBergqvist@…                     |          Owner:
     Type:  Bug Report - General                 |  jyavenard
 Priority:  major                                |         Status:
Component:  MythTV - Audio Output                |  infoneeded_new
 Severity:  medium                               |      Milestone:  unknown
 Keywords:                                       |        Version:
  osd,audio,freesat,surround,5.1,2.0,stereo      |  0.27-fixes
                                                 |     Resolution:
                                                 |  Ticket locked:  0
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Comment (by JohnLBergqvist@…):

 I'll try and upload a sample tomorrow.
 My audio device is an HDMI port (ALSA) on my graphics card going to stereo
 speakers on a TV, without any upmixing. Unsure whether bit-streaming is
 enabled, how would I check that? Also if it's my amplifier that detects
 the change, why does it detect it every time on the XBMC frontend (which
 is playing the same LiveTV file through the mythbackend), but not in
 MythFrontend? Unless it's simply a flag in the audio which MythTV isn't
 looking for? (or doesn't look again after playback has started)

 Replying to [comment:1 jyavenard]:
 > Please provide a short sample where this change doesn't occur and
 specify what your audio settings are: audio device, if bit steaming is
 enabled, up mixer etc.
 >
 > Changing channel detection is part of my regression tests and I have
 several samples testing all AC3 channel change type. And they all work
 just fine.
 >
 > If bit streaming, and up mixer disabled there's nothing to change audio
 wise. As far as myth is concerned it's all stereo (AC3 is carried over a
 stereo PCM regardless of the number of channels)  and it would be up to
 your amplifier to detect the change. Nothing we can do there.
 >

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Ticket URL: <https://code.mythtv.org/trac/ticket/12193#comment:2>
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