Hello, Sorry for the very late reply. Since I had time, I checked the pipewire on my Tumbleweed machine, and it works fine. That's all I did; 1. copy of 50-sound.conf to /etc/modprobe.p from usb memory 2. $ systemctl --user daemon-reload 3. $ systemctp --user start pipewire pipewire-pulseaudio wireplumber where; $ cat /etc/modprobe.d/50-sound.conf options snd slots=snd-usb-audio # uniq.unknownkey0:USB Audio alias snd-card-0 snd-usb-audio and, cat /proc/asound/cards0 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7210000 irq 28 1 [NVidia ]: HDA-Intel - HDA NVidia HDA NVidia at 0xf7080000 irq 17 2 [HDDAC1 ]: USB-Audio - HD-DAC1 D & M Holdings Inc. HD-DAC1 at usb-0000:00:14.0-9, high speed I didn't make any settings for HDA-Intel, and witout pulseaudio-setup package. In your case, the same phenomenon appears on all four Tumbleweed machines, so I'm thinking it's a driver problem. I'm sorry, but I don't know anything more about it. Regards. --- ┏━━┓彡 Masaru Nomiya mail-to: nomiya @ galaxy.dti.ne.jp ┃\/彡 ┗━━┛ "Tim Cook, the C.E.O. of Apple, said earlier this year that he would not let his nephew join social networks. Bill Gates banned cellphone until his children were teenagers, and Melinda Gates wrote that she wished they had waited even longer. Steve Jobs would not let his young children near iPads." -- The New York Times --