I recently purchased a Behringer UV1 USB Channel strip interface and found that the Analog Stereo Duplex profile using Pipewire+ALSA would work as a source but not an output, but if I selected the IEC958 Profile, everything works fine. Indeed, the device has no digital outs, so I modified /usr/share/alsa/cards/USB-Audio.conf setting the iec958 index to 999, and now the Analog Stereo Duplex profile is working nicely.

I'm not sure whether "Behringer UV1" or "UV1" is the correct card string so I've uploaded my alsa-info output with id f4314b25c46bf1f9aa35231aad198db6723bec17.

Thanks!!