Joe Emenaker wrote:
> 1 - Is snd-usb-audio supposed to be driving usb midi interfaces?
Yes.
> If so, does anyone have any idea why it's failing?
Because the usb-midi driver grabs the device first.
Remove usb-midi.o, or add usb-midi to the /etc/hotplug/blacklist file.
> ALSA ../alsa-kernel/usb/usbaudio.c:2187: cannot create a card instance 0
This error message may indicate wrong module options. Probably both the
driver for your first soundcard and the snd-usb-audio driver were told to
be the first sound card ("index=0"). Please show your /etc/modules.conf.
> 3 - I thought that the "snd-" prefix got dropped a while back, yet the
> Makefile still makes the modules with the "snd-" on the front. Was
> dropping "snd-" a debianism, or is there something stranger happening?
The snd- prefix (of module names) wasn't dropped, but the snd_ prefix
(of module option names) was.
> 4 - What tools are good for testing the midi-in and midi-out ports?
alsa-lib/test/midiloop (go to alsa-lib/test, say "make midiloop", then
run "./midiloop -v -i hw:x,0 -o hw:x,0"). Unfortunately, this program may
fail with USB MIDI devices because the USB MIDI protocol doesn't use
running status.
HTH
Clemens
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