Hi Wim,
I decided to give this a try with my Logitech C270, and it works! I ran:
webcam /u/x640/y360/a/h/n/s | ffplay -f mjpeg -framerate 50 -i -
and got a window with live video. Then ran:
ffplay -f s16le -ar 48000 -ac 1 -showmode 1 -i \PIPE\Webcam\Audio
and got another window with a live sound wave and could hear the echo of my voice... woohoo!
When I went to shut it all down, I got a TrapE in USBEHCI when I closed the webcam console. I am using both of Lars' USBAudio drivers. The console showed a couple of errors, so I will upload a log of it in case it is interesting. Thanks for this great software!
Regards,