Quoting Dave Phillips in a three parts article for
Linux
 Journal: "At some point, almost every serious MIDI musician
 needs to monitor a MIDI data stream, perhaps to diagnose a
 malfunctioning piece of equipment or to examine the
 contents of a MIDI sequence during playback". 
I like it. Cool to control what's coming out of any ALSA
sequencer client.
Did build fine on my Gentoo box, BTW ;-) .
Thanks for it.
 Best regards
    ce