"In this final section I'll present some MIDI-specific
troubleshooting tips, along with a brief description of the setup
here at StudioDave, a few closing remarks, and of course some links
to the Linux music-maker du jour.
"MIDI problems are generally easier to diagnose than audio
difficulties. As you might already know, MIDI does not carry audio
data, and the tools for troubleshooting MIDI problems are quite
simple to use and understand. Your MIDI troubleshooting toolkit
should include at least a MIDI monitor program and the ALSA amidi
utility. The amidi tool can be used to send an arbitrary MIDI
command string to any MIDI device in your system, and the MIDI
monitor can watch the data stream to see if your command was
correctly sent and delivered..."