On Sat, May 29, 2010 at 1:16 PM, Aaron Krister Johnson <aaron@akjmusic.com> wrote:

Hi,

It seems that I'm very confused by the whole jack MIDI system. Are
there some docs to refer to, as in a tutorial? I'm confused why Julien
needs to use so many Jack applications to set up a single MIDI
connection...it's certainly less involved with aconnect. And I've
certainly started jackd with -X and have access to alsa sequencers--so
why the other timer and bridge apps, etc?

the timing behaviour of the two -X options (seq and raw) are not very good. some might be sufficiently uncharitable as to call them "unusable".

a2jmidid (at least versions of it that are less than a year old) are much much better and for now its the recommended way to make ALSA sequencer ports show up in JACK.

some people (including julien) want JACK MIDI ports to show up as ALSA sequencer ports too, so he has an additional program for that (j2a_bridge).

finally, julien is running a program to generate MIDI clock messages.

--p