Hi,
Thanks to your answers, I managed to record sounds using my webcam, connecting to rsnd device and, more important, I think I understood why aucat couldn't find the device earlier. I overlooked man sndio (7) because I misunderstood man sndiod (8) and tried to connect to /dev/ instead of sndio(7) devices that are described in man aucat(1) -f option. Best regards and many thanks, Damien Thiriet