[pulseaudio-tickets] [PulseAudio] #400: Pulseaudio is downmixing channels to every speaker (using 4 channels)

[PulseAudio]

#400: Pulseaudio is downmixing channels to every speaker (using 4 channels)
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  Reporter:  Cimi    |       Owner:  lennart
      Type:  defect  |      Status:  new    
  Priority:  normal  |   Milestone:         
 Component:  daemon  |    Severity:  normal 
Resolution:          |    Keywords:         
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Comment (by lennart):

 This is the interesting part:

 {{{
 D: resampler.c:        I00   I01   I02   I03   I04   I05
 D: resampler.c:     +------------------------------------
 D: resampler.c: O00 | 0,375 0,750 0,375 0,000 0,000 0,000
 D: resampler.c: O01 | 0,375 0,000 0,375 0,750 0,000 0,000
 D: resampler.c: O02 | 0,375 0,000 0,375 0,000 0,750 0,000
 D: resampler.c: O03 | 0,375 0,000 0,375 0,000 0,000 0,750
 }}}

 This shows the input channels (i.e the one of your stream) and the output
 channels (the one of your device) and the multiplication factors for the
 input channels to get to the summed output samples.

 We also see the channel mapping that was specified for your stream:
 lfe,front-left,front-center,front-right,rear-left,rear-right

 And your device is surround40:0 which is the mapping front-left,front-
 right,rear-left,rear-right.

 The problem I see here is that front-center is mixed into the rear
 channels. Is that the problem you were trying to point out?

-- 
Ticket URL: <http://www.pulseaudio.org/ticket/400#comment:11>
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