Lead sheets as code.
A single bar is represented as a vector. Each element in that vector is a whole beat, and the elements can themselves be vectors allowing subdivisions within beats. The number of elements in the subvectors determine the length of the subdivisions. For example [:D :G] would be eighth notes, [:D ! :G] would be twelfth notes, [:D ! :G !] would be sixteenths, and so on.
A whole note could be written as [:D], [:D - - -] , [[:D] -].
A half note could be written as [:D !], [:D - ! !] , [[:D] !].
A quarter note could be written as [:D ! ! !], [[:D] ! ! !].
Tie: -
Rest: !
Hit (for drums): x
Root (bass and chords): r - for bass will play the root note, for chords will play the chord in root position
Intervals: bass only. M2, m2, M3, m3, d4, p4, a4, d5, p5, a5, m6, M6, m7, M7, o
Voicings/inversions: chords only. Can be a number e.g. 3 for the 3rd inversion, as well as drop2, -rA (rootless voicing A using 3-5-7-9), -rB (rootless voicing B using 7-9-3-5). Could also be a vector, e.g. [3 5 7 9] for the rootless voicing A.