Hello, I have two ESI M4U MIDI interfaces, both have the same problems: it seems that the interface drops MIDI events, especially when many events are sent (ie. play a MIDI file). When the MIDI bandwidth increases, more events seem to drop, but I haven't observed that experimentally yet.
I don't have these problems when I use the MIDI interface present on internal sound cards (ie. snd-ens1371 and emu10k1). I have this problem with a vanilla kernel 2.6.20 on Slack 11, with the alsa version shipped with that kernel. My Ubuntu 7.04 machine has the same problem, and my 2.4 kernel workstation with alsa 1.0.12 drivers also. there is no improvement when I manually upgrade the Ubuntu 7.04 system to alsa-drivers-1.0.14rc3, so my problem seems not to have any fix in officially released alsa versions, unless I overlook something obvious? I first experienced these problems when I tried to run Monkey Island games in dosbox with an external Roland MT-32 module in combination with an ESI M4U. Some notes stayed on, and the music doesn't sound right. When I used the MIDI output of the ens1371, everything worked perfectly. My questions are: - Is this a bug that should be reported somewhere else? - Can anyone help me with this problem? - If not, how can I proceed further, or be of assistance to developers that can help me? I have some experience with Linux driver programming, but not USB and ALSA. However, I do have some experience with programming the ALSA sequencer in userspace. Thanks in advance for your time and ideas, Greetings, Raymond Dresens. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
