pipewire configuration
setting the device to use for audio
we can find the device hw number using aplay -l or arecord -l
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC1220 Analog [ALC1220 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC1220 Digital [ALC1220 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: U192k [UMC404HD 192k], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
{ factory = adapter
args = {
factory.name = api.alsa.pcm.source
node.name = "Behringer UMC404HD"
node.description = "UMC404HD"
media.class = "Audio/Source"
# api.alsa.path = "hw:2,0"
api.alsa.path = "hw:2,0"
audio.channels = 2
audio.position = "FL,FR"
}
#}