On 21-07-2020 10:05, Takashi Iwai wrote: > For USB, basically the snd-usb-audio USB audio class driver is the > place to start with. Other USB audio drivers are very > device-specific, often the result of reverse engineering and might be > poorly supported. > > Which actual card -- I don't know, honestly speaking, too. There are > way too many devices in the market. Thanks much for the answer. I'll start studying snd-usb-audio and will try to make sense of things. Rene.