Xonar DGX on Ubuntu 18.04

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When switching from Windows to Ubuntu 18.04, my sound card (Asus Xonar DGX) didn’t seem to work anymore.

After searching around a little bit I found a really easy fix:

  1. In Settings/Sound, select Xonar DGX as the default output using the “Analog Surround 5.1 Output” profile
  2. Launch alsamixer in a terminal, select the right sound card (F6), go to “Analog Output” (arrow right) and select “Multichannel” (arrow up)

Now surround is working using the Xonar DGX sound card. However, even 2 channel audio was being played over all 5 speakers now. To prevent “upmixing” from 2 channel audio to 5 channel audio, you can disable it:

  1. Edit /etc/pulse/daemon.conf
  2. Find (or add) the enable-remixing setting and set it to no
  3. Restart your PC

Sources

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