A MIDI "Note On" event should typically be followed by a "Note Off".
The makenote object will automatically send out a "Note Off" (actually a "Note On" with velocity=0) after a specified time in milliseconds.
The flush object (provided from the Cyclone library) will keep track of "Note On" events passing through it and when "banged", will send out "Note Offs" for all unterminated notes.
A stripnote object takes pitch and velocity messages and only passes values for velocity > 0.
