thomas schorpp wrote:
> thomas schorpp wrote:
> 
>>hi
>>
>>1.
>>using ac3dec with vdr or /usr/bin/speaker-test with plug:surround51 
>>(/usr/share/alsa/pcm/surround51.conf)
>>on a (crosschecked) sunnyline 5.1 headset it turns out here that the channels 
>>arrangement on the analog output jacks does not 
>>conform to the "reference" channels arrangement of the cmedia ms-windows 
>>driver/user space sw...
>>
>>a)
>>BTW in this operating mode the mixer controls have no effects here and sounds 
>>seems to lack LFE.
> 
> 
> correction: the available mute controls work
> 
> 
>>VLC fails using the 5.1 mode of this device, too.
>>
>>b)
>>is there a way to change the channel arrangement (especially C/LFE swap) in 
>>userspace?
>>
>>yes, ive read most of the availlable conf docs at the project site but this 
>>rests as "cryptic code" to me,
>>who can read and understand this pcm conf stuff language? nor i can find a 
>>starting point for 
>>days now. ok, the driver loads and asound.state is restored but how are these 
>>conf files involved, i cant 
>>see the flow chain for now.
> 
> 
> ok, ive found a short introducory doxygen documentation about configuration 
> in the debian 
> libasound2-doc package, but questions left.
> 
> 
>>if the ac'97 patch source of the driver is incomplete or unadapted i would 
>>gladly help out on the dev list 
>>then.
>>
>>and c-media corp. are cool guys, look there ;) http://www.cmedia.com.tw/ :
>>
>>Product       File
>>(Click to Download)   Version Release Date    OS      Category
>>CMI9761       Please visit http://www.alsa-project.org/                       
>>Linux   Hyperlink
>>
>>:D ... so I hope the devs have got the "actual" specs availlable if they are 
>>supposed to do support 
>>work (in agreement?) for cmedia...
>>
>>2.
>>to get software controls and equalizer ive first tried to pipe through 
>>mplayer but expectedly 
>>didnt work. can i use gstreamer...?
> 
> 
> nobody interested? do you all use external spdif receiver-amps?
> 

http://alsa.opensrc.org/SurroundSound

ok, theres more config todo, i post it to the list, 
if i get a sufficent setup together, ttable...hmm

> 
> 
>>
>>regards,
>>tom
> 


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