ASUS RoG Strix Z790-F: SPDIF (PCM) has wrong channels | how to get passthrough working?

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alsa-project/alsa-ucm-conf issue #434 was opened from Nightwing0815:

Hi there,

finally, [after a long journey,](https://github.com/alsa-project/alsa-ucm-conf/issues/350) yesterday I did an update from linuxmint to newest version 22, based on ubuntu 24.04 (I'll attach alsa-info and a system info).

Now it's no big problem any more, to get SPDIF working: I just selected the right device and muted all others in alsamixer, except the pcm signal.
But hey, there's a new problem:
With a speaker-test -c6, I'm not able to hear my rear channels and the lfe channel, where they should be. Rear coming on front speakers...
So, what do I have to do?
Further, I'm asking for help to configure a pcm signal passthru for dts and (e)ac3 soundfiles. My teufel receiver recognices only a 5.1 stereo source, not an DD5.1 or DTS signal...

[alsa-info.txt](https://github.com/user-attachments/files/16417700/alsa-info.txt)
[sysinfo.txt](https://github.com/user-attachments/files/16417724/sysinfo.txt)


Thanks in advance for getting this problems solved,

ToM

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/434
Repository URL: https://github.com/alsa-project/alsa-ucm-conf



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