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Tonic

Demo

Swift library for music theory, currently focused on chords/harmony.

Tonic answers musical questions, such as:

  • What's the note for this pitch in this key?

    Note(pitch: Pitch(midiNoteNumber), key: .Bb)

  • What's the name of a chord?

    Chord(notes: notes).description

  • What chords are in this key?

    Key.Cm.chords

  • What chords in this key contain this note?

    Key.C.chords.filter { $0.noteClasses.contains(.C) }

  • What notes do these keys have in common?

    Key.C.noteSet.intersection(Key.Cm.noteSet)

  • What notes don't these keys have in common?

    Key.C.noteSet.symmetricDifference(Key.Cm.noteSet)

These questions are all tested in our unit tests explicitly.

Goals

  • Correctness. Try to be as correct with respect to music theory as possible.
  • Strong typing. Use types to prevent errors (e.g. Pitch instead of UInt8).
  • Good performance. Tonic uses bit sets to represent pitch sets and note sets.

Documentation

The documentation is host on the AudioKit.io Website. The package includes a demo project as well.

Install

Install using Swift Package Manager.