[mythtv-commits] Ticket #8627: Upmix not working - got weird sound on DVB channels that transmit only 2 channels (Stereo)

MythTV mythtv at cvs.mythtv.org
Wed Jun 30 08:29:31 UTC 2010


#8627: Upmix not working - got weird sound on DVB channels that transmit only 2
channels (Stereo)
------------------------------------+---------------------------------------
 Reporter:  benny@…                 |       Owner:  jyavenard  
     Type:  defect                  |      Status:  new        
 Priority:  major                   |   Milestone:  unknown    
Component:  MythTV - Audio Output   |     Version:  Unspecified
 Severity:  medium                  |     Mlocked:  0          
------------------------------------+---------------------------------------
 Testing trunk-25198 with MythBuntu weekly builds
 (0.24.0~trunk25198-0ubuntu0~mythbuntu1)

 - Using MSI Meda Live (http://www.mythtv.org/wiki/MSI_Media_Live)  with
 MythBuntu 10.04 - weekly builds of MythTV
 - Pulse Audio is turned off

 - Audio Configuration:
   - Device set to: ALSA:iec958
   - Speaker configuraation: 5.1
   - DTS and Dolby Digital is checked
   - The computer is connected directly to a Harmon Kardoon receiver via
 Digital Coaxial cable.
   - Upmix is on - set to "Fastest"

 When looking on DVB channels that transmits only 2 channels, the receiver
 detect Dolby Digital audio but, the upmix results in just hearing a lot of
 garbage.

 DVB channels that transmits more then 2 channels, already 5.1 or something
 similar, then everything works OK.

 Turning off upmix in configuration results that all DVB channels are
 transmited with 2 channel audio. Which make me think that the audio engine
 do some kind of downmix for channels with 5.1 audio in this case.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/8627>
MythTV <http://www.mythtv.org/>
MythTV


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