Enumerations

The KeyType enum distinguishes between major and minor keys and produces scale patterns for each.

The PitchLetter type is an enum whose raw value is the pitch class. The convention used is Cs for C-sharp, and Eb for E-flat, etc. Note that these are octave-invariant abstractions, like pitch-classes but for more tonal contexts.

MatrixForm** is an enum to help navigate ToneMatrix objects. The four forms available are p, i, r, and ri, corresponding to Prime, Inversion, Retrograde, and Retrograde-Inversion respectively.

The NoteValue enum type, with a Double rawValue, consists of scaling factors for use as standard durations. Plugged into the equation as described below, they will yield approx. durations (in seconds).

seconds = 60/(tempo * (noteValue.rawValue/4))

Note that the convention used is n_4 for a quarter-note, t_8 for a triplet eighth-note, d_16 for a dotted sixteenth-note, etc.

The Transformation enum identifies types of neo-riemannian transformations. Available transformations: P, R, L, N, S, H.

The ChordQuality enum identifies triadic chord qualities for easy use in transformational contexts.