How to use a analog microphone plugged into Realtek ALC1220 chip in PipeWire

I got a microphone connected via a XLR adapter to the rear mic jack of my mainboard. The audio dialog of KDE seems to detect that, as does not mark it as not connected (which it does for the front mic and line in). But selecting the audio device as source does not produce any useful sound. What makes you sure that the mic work, you may ask? If I enable the loopback in alsamixer (and pump up the boost), it works. Unfortunately, that is the only way I can get sound out of that.

It seems, as if the system realizes two possible sources from the audio device. But there is no option GUI wise where I can select the second input to test if that helps.

<span style="color:#323232;">alsactl info
</span><span style="color:#323232;">#
</span><span style="color:#323232;"># Sound card
</span><span style="color:#323232;">#
</span><span style="color:#323232;">- card: 0
</span><span style="color:#323232;">[....]
</span><span style="color:#323232;">#
</span><span style="color:#323232;"># Sound card
</span><span style="color:#323232;">#
</span><span style="color:#323232;">- card: 1
</span><span style="color:#323232;">  id: Generic
</span><span style="color:#323232;">  name: HD-Audio Generic
</span><span style="color:#323232;">  longname: HD-Audio Generic at 0xba600000 irq 68
</span><span style="color:#323232;">  driver_name: HDA-Intel
</span><span style="color:#323232;">  mixer_name: Realtek ALC1220
</span><span style="color:#323232;">  components: HDA:10ec1168,10438724,00100003
</span><span style="color:#323232;">  controls_count: 47
</span><span style="color:#323232;">  pcm:
</span><span style="color:#323232;">    - stream: PLAYBACK
</span><span style="color:#323232;">      devices:
</span><span style="color:#323232;">        - device: 0
</span><span style="color:#323232;">          id: ALC1220 Analog
</span><span style="color:#323232;">          name: ALC1220 Analog
</span><span style="color:#323232;">          subdevices:
</span><span style="color:#323232;">            - subdevice: 0
</span><span style="color:#323232;">              name: subdevice #0
</span><span style="color:#323232;">        - device: 1
</span><span style="color:#323232;">          id: ALC1220 Digital
</span><span style="color:#323232;">          name: ALC1220 Digital
</span><span style="color:#323232;">          subdevices:
</span><span style="color:#323232;">            - subdevice: 0
</span><span style="color:#323232;">              name: subdevice #0
</span><span style="color:#323232;">    - stream: CAPTURE
</span><span style="color:#323232;">      devices:
</span><span style="color:#323232;">        - device: 0
</span><span style="color:#323232;">          id: ALC1220 Analog
</span><span style="color:#323232;">          name: ALC1220 Analog
</span><span style="color:#323232;">          subdevices:
</span><span style="color:#323232;">            - subdevice: 0
</span><span style="color:#323232;">              name: subdevice #0
</span><span style="color:#323232;">        - device: 2
</span><span style="color:#323232;">          id: ALC1220 Alt Analog
</span><span style="color:#323232;">          name: ALC1220 Alt Analog
</span><span style="color:#323232;">          subdevices:
</span><span style="color:#323232;">            - subdevice: 0
</span><span style="color:#323232;">              name: subdevice #0
</span><span style="color:#323232;">  hwdep:
</span><span style="color:#323232;">    - device: 0
</span><span style="color:#323232;">      id: HDA Codec 0
</span><span style="color:#323232;">      name: HDA Codec 0
</span><span style="color:#323232;">      iface: 16
</span><span style="color:#323232;">[...]
</span>

<span style="color:#323232;">arecord -l                                            Do 14 Dez 2023 14:53:16 CET
</span><span style="color:#323232;">**** List of CAPTURE Hardware Devices ****
</span><span style="color:#323232;">[...]
</span><span style="color:#323232;">card 1: Generic [HD-Audio Generic], device 0: ALC1220 Analog [ALC1220 Analog]
</span><span style="color:#323232;">  Subdevices: 1/1
</span><span style="color:#323232;">  Subdevice #0: subdevice #0
</span><span style="color:#323232;">card 1: Generic [HD-Audio Generic], device 2: ALC1220 Alt Analog [ALC1220 Alt Analog]
</span><span style="color:#323232;">  Subdevices: 1/1
</span><span style="color:#323232;">  Subdevice #0: subdevice #0
</span><span style="color:#323232;">[...]
</span>

Does anyone have any clue what I could do to use that mic?