[mythtv-commits] Ticket #9930: Distorted alsa-output on some soundcards

MythTV noreply at mythtv.org
Fri Jul 22 07:36:15 UTC 2011


#9930: Distorted alsa-output on some soundcards
-----------------------------------+---------------------------
 Reporter:  mac20xx@…              |          Owner:  jyavenard
     Type:  Patch - Bug Fix        |         Status:  new
 Priority:  minor                  |      Milestone:  0.24.1
Component:  MythTV - Audio Output  |        Version:  0.24.1
 Severity:  medium                 |     Resolution:
 Keywords:  distorted alsa output  |  Ticket locked:  0
-----------------------------------+---------------------------

Comment (by mac <mac20xx@…>):

 > The write_size is always fragment_size which is period_size *
 output_bytes_per_frame * 2 so by definition it is always a multiple of
 period_size.

 As long as you're only multiplying you're right

 > So if period_size isn't a multiple of "alsa-frames" (as you call it) ;
 the issue is within ALSA, not myth...

 I called them alsa-frames because they are not the same as frames in
 mythtv



 I will switch back to mythtv 0.24.1 without patches to give you some
 debugging output to you.


 > Something that wouldn't surprise me as the type of audio corruption you
 describe never occurred with ALSA <= 1.0.22 and only occurs with recent
 version of alsa

 I don't believe that this is an alsa related problem. Audacious always
 worked fine.

-- 
Ticket URL: <http://code.mythtv.org/trac/ticket/9930#comment:3>
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