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I can't get any input from my microphone (part of headset) on my ASUS Zenith II Extreme Alpha desktop running Ubuntu 20.04. I've tried many things I found while researching online, but none have helped. The microphone works fine under Windows 10 (dual boot). Sound settings give two options for sound: 1) Analog Input -USB Audio, and 2) Digital Input (S/PDIF) - USB Audio. Neither of these work for the microphone. The headphones do work. If I run the command:

cat /proc/asound/card*/codec* | grep Codec

I get only:

Codec: Nvidia GPU 91 HDMI/DP

The MOBO uses a SupremeFX S1220A High Definition Audio CODEC, which is a custom version of the Realtek ALC1220. Lastly, if I plug the headset 3.5mm jack into a USB-C adapter, and select "Headset Microphone - Headphone adapter" it works. Unfortunately, I don't want to use the adapter due to other reasons. Any suggestions?

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  • After more investigation / trials, I was able to make recordings with "arecord". "arecord -l" gives 1 card with 3 devices. Using the command 'arecord -f S16_LE -c 2 -r 48000 -d 10 --device="hw:1,2" test.wav' I was able to record the microphone. Note that both inputs listed in sound settings still do not register anything.
    – Mark W.
    Jun 13, 2021 at 17:38
  • After more investigation / trials, I used alsamixer to increase the microphone volume. Yes, the microphone shows up on alsamixer and arecord can capture and record input from the microphone. However, gnome settings / sound doesn't detect any sound when I speak into the microphone on either the Analog Input or the Digital Input selections.
    – Mark W.
    Jun 17, 2021 at 19:34

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