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AudioKit/Tonic 1.0.4
Swift library for music theory
⭐️ 49
🕓 1 week ago
.package(url: "https://github.com/AudioKit/Tonic.git", from: "1.0.4")



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?


  • What chords in this key contain this note?

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

  • What notes do these keys have in common?


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


These questions are all tested in our unit tests explicitly.


  • 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.


Install using Swift Package Manager.


Stars: 49
Last commit: 3 days ago
jonrohan Something's broken? Yell at me @ptrpavlik. Praise and feedback (and money) is also welcome.

Release Notes

Version 1.0.4
2 days ago

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