Thanks for the quick reply!
Is snd-usb-audio loaded?
Yes.
Is usb-midi _not_ loaded?
usb-midi is not loaded.
Does the device appear in /proc/asound/cards and in the output of "amidi
-l" and "arecordmidi -l"?
Yes.
Is there some output for keys and/or controllers when running "amidi -d -p
portname"?
Output is FF for any controller movement.
Also after moving a controller, it disables sensing of keyboard input for
10-20 presses.
Regards,
James