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MusicKit

MusicKit is a framework and DSL for creating, analyzing, and transforming music in Swift.

Examples

Functional harmony

let C5 = Pitch(midi: 72)
let neapolitan = Major.bII
print(neapolitan(C5))               // [C♯5, E♯5, G♯5]
let G4 = Chroma.G*4
let plagalCadence = [Major.IV, Major.I]
print(plagalCadence * G4)           // [[C5, E5, G5], [G4, B4, D5]]
let V7ofV = HarmonicFunction.create(Scale.Major, degree: 5, chord: Major.V7)
print(V7ofV(C5))                    // [D6, F♯6, A6, C7]

Chord recognition

let pitchSet: PitchSet = [Chroma.B*0, Chroma.Cs*2, Chroma.F*3, Chroma.G*4]
print(Chord.name(pitchSet))        // G7♭5/B
let descriptor = Chord.descriptor(pitchSet)
print(descriptor)                  // root: G, quality: 7♭5, bass: B

MIDI I/O

let midi = MIDI(name: "WholetoneClusters")
midi.noteHandler = { messages in
    if let first = messages.first {
        midi.send([first, first.transpose(2), first.transpose(3)])
    }
}

Framework Overview

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musickit's Issues

iOS example project with AudioKit

The flagship example project should:

  • run on iOS
  • not require a MIDI keyboard
    • keyboard on screen (use keyboard from Taptone)
  • produce sound (using AudioKit)

how to play a midi with Chord ..

the chaosHarmonizer example don't run everything..

let midi = MIDI(name: "ChaosHarmonizer")
        midi.noteHandler = { messages in
            if let first = messages.first {
                if first.on {
                    let possibleChords = [
                        ChordQuality.Major,
                        ChordQuality.Minor,
                        ChordQuality.Sus2,
                        ChordQuality.Sus4,
                    ]

'''

Improve PitchClass

Initing a pitch with PitchClass should be more concise.

Also, the correct term seems to be Chroma. a pitch class is the set of all pitches with the same chroma.

Pitch(pitchClass: .Gs, octave: 4)
or even
PitchClass.Gs_4

todos

  • Typealias gamut Set
  • * operator for Pitch * Harmonizer and Pitch * [Harmonizer]
  • Harmonizer.create should be 1-indexed
  • let V7ofV = Harmonizer.create(Scale.Major, 5, Major.V7)
  • PitchSet/ PitchClass should add pitch class at root
    PitchClass` should have sensible constants like As, A

functional refactor

Chords should be functions
Chord :: Pitch -> PitchSet
Chord.Major(c4)

Scales should be polymorphic functions
Scale.Minor(c4)
Scale.Minor([1, 3, 5]) (c4)

PitchSet should support operators:
PitchSet +/- PitchSet
PitchSet +/- Float

Sharps only

Hi,
I've been having a look at this great resource and was wondering how we would go about making sure when you print the scale like A Major it prints --> [A4, B4, C♯5, D5, E5, F♯5, A♭5]
Though A major only has sharps. So the A♭5 should be G#5. I'm looking in the Pitch.swift file and wondering would this be the place to assign the Note and Sharp type if it is a sharp key?
Thanks in advance for your help.
I look forward to talking with you.
Regards Gerard

Add Key

only Major + Minor keys
Key.Identify

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