measure::= pitch-w | half half
half::= pitch-h | quarter quarter
quarter::= pitch-q | pitch pitch
pitch::=C | D# | F | F# | G | A# | C6
chordmeasure::= chord-w | halfchord halfchord
halfchord::= chord-h | chord-q chord-q
chord::=Cmin | Cmin7 | Fdom7 | Gdom7
bassdrum::= O..o | O... | O..o | OO..
snare::= ..S. | S..s | .S.S
crash::=...* | *...
claps::=x..x | xx..x