Introduction to abcMIDI is the name of a presentation I have given on the abcMIDI software package, part of the ABC Music project. abcMIDI is useful for typesetting ABC music, converting ABC to and from MIDI, and manipulating ABC music files.
You can browse the current version of the presentation (version 1.0) or view it directly.
Enjoy!
Gentoo users who wish to install abcMIDI, but find that the version in their portage tree is broken, may consider using this ebuild.