• Updates the NoteValue data type from enum to struct.
• Maintains the old enum cases as static properties.

Fixes failing unit tests.

110 scales in total.

Added harmonic functions support!
Now you can create harmonic functions from a scale and get possible directions for a key according to its harmonic function in the scale.

Represents a custom chord type for the chords that can not be represented by the current data structures.
Can be initialized with the custom intervals.

• Generate roman numerics for chords
• Make ScaleType and ChordProgression struct instead of enum

You can create chord progressions now. It supports custom ones with Codable protocol, that you can store and use later.

let progression = ChordProgression.i_ii_vi_iv
let cSharpHarmonicMinorTriadsProgression = progression.chords(
  for: cSharpHarmonicMinor,
  harmonicField: .triad,
  inversion: 0)