Hi Stéphan
Have a look here
https://github.com/lintweaker/mytekusb2
You have a specific driver for usb2.
I don't find informations about alsa version. This is different between 0.3 and 0.4.
If not working in 0.4 you may have to downsize in 0.3
In mytek site i just see information about last macOS not supported.... So may have issues with last Linux kernel and alsa
Regards
Envoyé de mon iPhone en utilisant Tapatalk