Hi,

thanks for your answer, I just received an answer from the Manufacturer.
So it is much more complex than I assumed.

Here is what he wrote: (Translated from German in English)

> 
> The driver only provides the 128 Channel IO PCM interface.
> A mixer interface does not exist.
> You can define channels with asoundrc -
> https://wiki.ubuntuusers.de/.asoundrc/
> There are examples for the splitting of a 8 channel card in this
> article.
> 

So I setup this file 

nano /home/sov/.asoundrc


Code:
--------------------
    
  pcm.snd-card {
  type hw
  card 1
  device 0
  }
  
  ctl.snd-card {
  type hw
  card 1
  device 0
  }
  
  pcm.dmixer {
  type dmix
  ipc_key 1024
  ipc_perm 0666
  slave.pcm "snd-card"
  slave {
  period_time 0
  period_size 1024
  buffer_size 4096
  rate 96000
  channels 8
  }
  bindings {
  0 0
  1 1
  2 2
  3 3
  4 4
  5 5
  6 6
  7 7
  }
  }
  
  pcm.!default {
  type plug
  slave.pcm "dmixer"
  }
  
  pcm.stereo1 {
  type plug
  slave {
  pcm "dmixer"
  channels 8
  }
  ttable.0.0 1
  ttable.1.1 1
  }
  
  pcm.stereo2 {
  type plug
  slave {
  pcm "dmixer"
  channels 8
  }
  ttable.0.2 1
  ttable.1.3 1
  }
  
  pcm.stereo3 {
  type plug
  slave {
  pcm "dmixer"
  channels 8
  }
  ttable.0.4 1
  ttable.1.5 1
  }
  
  pcm.stereo4 {
  type plug
  slave {
  pcm "dmixer"
  channels 8
  }
  ttable.0.6 1
  ttable.1.7 1
  }
  
--------------------


But nothing happens there are still same numer of devices. Does anybody
have ever used this and can help?

The card is from FourAudio:
http://www.fouraudio.com/en/products/dante-pcie-card.html

Thanks S


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