I found this article: How do I change microphone to mono channel rather than stereo? - Support and Help - Ubuntu Community Hub
and it helps. So I used what you wrote in ~/.config/pipewire/pipewire.conf.d/mix-dual_array_mic.conf+ this article.
But, according to it, I need to write this command all time when I run Ubuntu, but I don;t think that it would be a problem.
(Sorry for me English =) )
No - once you have created that file your PipeWire will be configured any time you are logged into your desktop.
Dont follow that article as that is only for PulseAudio and only covers how to remap temporarily.
I havent tested the file I provided, if it didnt work to create a new node in your graph, then I made a mistake somewhere. Let me know if it doesnt work and I'll see if I can fix my mistake.
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So I tried your mix-dual_array_mic.conf and changed to control = { "Gain 1" = 0.0 "Gain 2" = 1.0 } and it didn’t help
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Can you share the full script that you are using? Along with the results of wpctl status?
Using the script I provided above (with the right target node), I see the following in qpwgraph which is basically what I expected:
The bottom right is the new input, which I can also see in Sound Preferences (but I haven't selected):
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