Next Step: Generating MIDI on Android

Found a nice article on generating MIDI files in Java (while not using the Java Sound API, which does not appear to be included with Android) at this link:

Generating simple MIDI files using Java, without using the Java Sound API

From that article, I began to learn about:

MIDI file format
deltas
timebase
in MIDI, notes are not specified by duration but by their on/off times