[linux-audio-user] UM2 USB midi interface is the guilty ?
rlrevell at joe-job.com
Thu Aug 18 20:55:08 EDT 2005
On Wed, 2005-08-17 at 16:45 +0200, Clemens Ladisch wrote:
> > Surprisingly, aseqdump is detecting both devices.
> This one uses the ALSA API correctly.
Actually I think there is a bug. Here's my MIDI setup:
Port Client name Port name
0:0 System Timer
0:1 System Announce
62:0 Midi Through Midi Through Port-0
64:0 Audigy MPU-401 (UART) Audigy MPU-401 (UART)
64:32 Audigy MPU-401 (UART) Audigy MPU-401 #2
If have gmidimon running on /dev/midi, aseqdump -p 64:0 fails with
-EBUSY, and dmesg says this:
ALSA sound/core/seq/seq_midi.c:187: midi input open failed!!!
But this should work, since gmidimon opens /dev/midi readonly:
rlrevell at mindpipe:~/cvs/alsa$ sudo lsof /dev/snd/midiC0D* /dev/midi*
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
gmidimon 20112 rlrevell 4r CHR 14,2 3793 /dev/midi
Is concurrent access to MIDI by the ALSA sequencer and OSS apps really
forbidden? The debug printk leads me to believe that this is supposed
BTW I hate GTK 1.2 so much that I took 10 minutes to port gmidimon to
gtk-2.0. Patch is attached. Apply it *after* running ./configure, as I
couldn't get autoconf work right as it insists on
using /usr/bin/gtk-config which doesn't exist in GTK-2.0.
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