[<] = Crescendo hairpin
[x] = small cross
[\] = 45 degree downstroke
[/] = 45 degree upstroke
[/\] = large circumflex shape
[O|] = a circle bisected by a vertical line protruding both ways
[Gamma] = The Greek capital gamma
[mid-dot] = a dot at the height of a hyphen
[over-dot] = a single dot over the following letter
[Over-slur] = a frown-shaped curved line
[Under-slur] = a smile-shaped curved line (breve)
[reverse-apostrophe] = the mirror image of a closing quote
[Upper Mordent] = an upper mordent: /\/\/ with thick downstrokes
[Crenellation] = horizontals, low, high, low, connected by verticals
[Podium] = [Crenellation] with the third horizontal at half-height
[Step] = horizontal, vertical, horizontal, vertical, ascending
[Turn] = a turn (~)

[Figure 01] = extract available as a MIDI file (figure01.mid).
[Illustration] = all other illustrations.

For example, here's a D minor scale set to words:

[G: d' e' (f' g') a' b-' (c+'' d'')]
[W: One, two, three, four, five, six. ]

And a simple rhythmic example:

[3/4: 4 4 8 8 | 8. 16 2] = [- - ' ' - ' -]