[LAU] How to get a persistent midi instrument source port? ( lightweight )

[hgn]

Hello again,

24.03.2019 11:45 Jeanette C.:
> Hey there,
> do you need your MIDI instrument ports a lot with only JACK aware
> applications? If not, would it be convenient to stop JACK using the
> ALSA hardware ports?

I would prefer a pure JACK midi solution. I originally wrote midi 
hardware, but software keyboards and other midi controllers might be in 
the mix as well.

IIRC the Jack demo application simply copies audio in to audio out.  I 
am searching for that, but for midi.

-hgn