what about adding jackmidi support please ?
VMPK uses any MIDI backends supported by RtMIDI ( http://www.music.mcgill.ca/~gary/rtmidi/ ), but RtMIDI doesn't support Jack MIDI. I suggest you to request this feature to the RtMIDI author.
The latest release (1.0.13) supports Jack-MIDI backend.
RtMIDI 1.0.13 has been merged in SVN revision 254.
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