New subject: MIDI active sensing- USB midi and EvoMK461

12 Sep 2007

Simon Williams wrote:
...
  Interestingly, amidi --dump gives absolutely nothing
unless I press some
 keys. So where are these active sensing messages aseqdump keeps getting? 
Filtered out unless you add the -a option.  :)
...
  Here is what I got from the MK's own USB...
 90 30 50
 90 30 00
 90 32 4C
 90 32 00
 ...
 And here is what I got from the USB midi adapter...
 90 30 50
    30 00 
The USB MIDI protocol doesn't allow runing status ...
...
      00 32
     4C 00 
... and here is one zero byte too much.  Apparently, this device doesn't
conform to the USB MIDI specification.
Please uncomment the "#define DUMP_PACKETS" in line 58 or so of
sound/usb/usbmidi.c, recompile the snd-usb-audio driver, and show what
the driver writes to the system log when such note-on messages are
received.  (Warning: the driver will dump all packets, including those
containing active sensing messages.)
...
  Slightly OT: I would like to test this in windows, to
prove that the
 device really is broken, but I can't get any sounds from it or my MK.
 Does anyone know of a free software synthesizer for windows which will
 play sounds from a midi instrument? 
You should be able to use any sequencer to connect a MIDI input port to
Windows' built-in software synth.
Regards,
Clemens

Re: [LAU] MIDI active sensing- USB midi and EvoMK461