├── .gitignore
├── Canon.playground
    ├── Contents.swift
    └── contents.xcplayground
├── Evolution.playground
    ├── Contents.swift
    ├── contents.xcplayground
    └── playground.xcworkspace
    │   ├── contents.xcworkspacedata
    │   ├── xcshareddata
    │       └── IDEWorkspaceChecks.plist
    │   └── xcuserdata
    │       ├── Devin.xcuserdatad
    │           └── UserInterfaceState.xcuserstate
    │       └── rot.xcuserdatad
    │           └── UserInterfaceState.xcuserstate
├── JazzCycle.playground
    ├── Contents.swift
    └── contents.xcplayground
├── LICENSE
├── Moonlight.playground
    ├── Contents.swift
    └── contents.xcplayground
└── README.md


/.gitignore:
--------------------------------------------------------------------------------
 1 | # Xcode
 2 | #
 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 4 | 
 5 | ## Build generated
 6 | build/
 7 | DerivedData/
 8 | 
 9 | ## Various settings
10 | *.pbxuser
11 | !default.pbxuser
12 | *.mode1v3
13 | !default.mode1v3
14 | *.mode2v3
15 | !default.mode2v3
16 | *.perspectivev3
17 | !default.perspectivev3
18 | xcuserdata/
19 | 
20 | ## Other
21 | *.moved-aside
22 | *.xcuserstate
23 | 
24 | ## Obj-C/Swift specific
25 | *.hmap
26 | *.ipa
27 | *.dSYM.zip
28 | *.dSYM
29 | 
30 | ## Playgrounds
31 | timeline.xctimeline
32 | playground.xcworkspace
33 | 
34 | # Swift Package Manager
35 | #
36 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
37 | # Packages/
38 | .build/
39 | 
40 | # CocoaPods
41 | #
42 | # We recommend against adding the Pods directory to your .gitignore. However
43 | # you should judge for yourself, the pros and cons are mentioned at:
44 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
45 | #
46 | # Pods/
47 | 
48 | # Carthage
49 | #
50 | # Add this line if you want to avoid checking in source code from Carthage dependencies.
51 | # Carthage/Checkouts
52 | 
53 | Carthage/Build
54 | 
55 | # fastlane
56 | #
57 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
58 | # screenshots whenever they are needed.
59 | # For more information about the recommended setup visit:
60 | # https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.md
61 | 
62 | fastlane/report.xml
63 | fastlane/Preview.html
64 | fastlane/screenshots
65 | fastlane/test_output
66 | 


--------------------------------------------------------------------------------
/Canon.playground/Contents.swift:
--------------------------------------------------------------------------------
  1 | //Copyright (c) 2016 Devin Roth
  2 | 
  3 | import Foundation
  4 | import CoreMIDI
  5 | 
  6 | //midi setup
  7 | var client = MIDIClientRef()
  8 | var source = MIDIEndpointRef()
  9 | 
 10 | MIDIClientCreate("Canon" as CFString, nil, nil, &client)
 11 | MIDISourceCreate(client, "Canon" as CFString, &source)
 12 | 
 13 | sleep(1)    //wait until midi is setup
 14 | 
 15 | func midiOut(_ status:Int, byte1: Int, byte2:Int) {
 16 |     var packet = UnsafeMutablePointer<MIDIPacket>.allocate(capacity: 1)
 17 |     let packetList = UnsafeMutablePointer<MIDIPacketList>.allocate(capacity: 1)
 18 |     let midiDataToSend:[UInt8] = [UInt8(status), UInt8(byte1), UInt8(byte2)];
 19 |     packet = MIDIPacketListInit(packetList);
 20 |     packet = MIDIPacketListAdd(packetList, 1024, packet, 0, 3, midiDataToSend);
 21 |     
 22 |     MIDIReceived(source, packetList)
 23 |     packet.deinitialize()
 24 |     packetList.deinitialize()
 25 |     packetList.deallocate(capacity: 1)
 26 | }
 27 | 
 28 | //control variables
 29 | var seed = 200
 30 | var tempo = 120.0
 31 | var time = (tempo/60.0)*1000000.0
 32 | 
 33 | let violinIChannel = 144
 34 | let violinIIChannel = 145
 35 | let violinIIIChannel = 146
 36 | let bassoChannel = 147
 37 | 
 38 | //number generator
 39 | srand48(seed)
 40 | func random(_ limit: Int)->Int {
 41 |     let limit = Double(limit) - 1
 42 |     return Int(round(drand48()*limit))
 43 | }
 44 | 
 45 | let scale = [2,4,6,7,9,11,1]
 46 | let chordProgression = [[2,6,9],[9,1,4],[11,2,6],[6,9,1],[7,11,2],[2,6,9],[7,11,2],[9,13,4]]
 47 | 
 48 | var violinI = [0,0,0,0,0,0,0,0]
 49 | var violinII = [0,0,0,0,0,0,0,0]
 50 | var violinIII = [0,0,0,0,0,0,0,0]
 51 | let basso = [50,45,47,42,43,38,43,45]
 52 | 
 53 | func melodyFinder(melody: Int, harmony: Int, chord: [Int]) -> Int {
 54 |     var newMelody = 0
 55 |     let rand = random(2)
 56 |     
 57 |     if melody < 60 {
 58 |         newMelody = melodyUp(melody: melody, chord: chord)
 59 |     } else if melody > 80 {
 60 |         newMelody = melodyDown(melody: melody, chord: chord)
 61 |     } else if rand == 0 {
 62 |         newMelody = melodyUp(melody: melody, chord: chord)
 63 |     } else if rand == 1 {
 64 |         newMelody = melodyDown(melody: melody, chord: chord)
 65 |     }
 66 |     if newMelody%12 == harmony%12 {
 67 |         newMelody = melodyFinder(melody: newMelody, harmony: harmony, chord: chord)
 68 |     }
 69 |     
 70 |     return newMelody
 71 | }
 72 | func melodyUp(melody: Int, chord: [Int]) -> Int {
 73 |     var order = [Int]()
 74 |     for note in chord {
 75 |         if note <= melody%12 {
 76 |             order += [note + 12]
 77 |         } else {
 78 |             order += [note]
 79 |         }
 80 |     }
 81 |     order.sort()
 82 |     return melody + order.first! - melody%12
 83 | }
 84 | func melodyDown(melody: Int, chord: [Int]) -> Int {
 85 |     var order = [Int]()
 86 |     for note in chord {
 87 |         if note >= melody%12 {
 88 |             order += [note - 12]
 89 |         } else {
 90 |             order += [note]
 91 |         }
 92 |     }
 93 |     order.sort()
 94 |     return melody + order.last! - melody%12
 95 | }
 96 | 
 97 | while true {
 98 |     
 99 |     //shift violinII to violin III and violinI melody to violinII
100 | //    violinIII = violinII
101 |     violinII = violinI
102 |     
103 |     //generate new melody for violinI
104 |     if violinI.last == 0 {
105 |         violinI[0] = chordProgression[0][random(3)] + 72
106 |     } else {
107 |         violinI[0] = melodyFinder(melody: violinI.last!, harmony: violinI.first!, chord: chordProgression[0])
108 |     }
109 |     for note in 1..<8 {
110 |         violinI[note] = melodyFinder(melody: violinI[note - 1], harmony: violinII[note], chord: chordProgression[note])
111 |     }
112 |     
113 |     //send midi
114 |     for note in 0..<8 {
115 |         
116 |         //notes on
117 |         midiOut(violinIChannel, byte1: violinI[note], byte2: 50)
118 |         midiOut(violinIIChannel, byte1: violinII[note], byte2: 50)
119 | //        midiOut(violinIIIChannel, byte1: violinII[note], byte2: 50)
120 |         midiOut(bassoChannel, byte1: basso[note], byte2: 50)
121 |         
122 |         print(violinI[note])
123 |         
124 |         usleep(useconds_t(time))
125 |         
126 |         //notes off
127 |         midiOut(violinIChannel, byte1: violinI[note], byte2: 0)
128 |         midiOut(violinIIChannel, byte1: violinII[note], byte2: 0)
129 | //        midiOut(violinIIIChannel, byte1: violinII[note], byte2: 0)
130 |         midiOut(bassoChannel, byte1: basso[note], byte2: 0)
131 |     }
132 | }
133 | 


--------------------------------------------------------------------------------
/Canon.playground/contents.xcplayground:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2 | <playground version='5.0' target-platform='macos'>
3 |     <timeline fileName='timeline.xctimeline'/>
4 | </playground>


--------------------------------------------------------------------------------
/Evolution.playground/Contents.swift:
--------------------------------------------------------------------------------
  1 | import Foundation
  2 | import PlaygroundSupport
  3 | import CoreMIDI
  4 | 
  5 | // MASTER CONTROLS
  6 | 
  7 | // Seed for the random number generator.
  8 | var seed = 0
  9 | 
 10 | // Tempo. Standard range for tempo is 40-200.
 11 | var tempo = 80.0
 12 | 
 13 | // Density is the number of notes played in each measure. Each note will be played once before any note will be repeated.
 14 | var density = 7
 15 | 
 16 | // MIDI SETUP
 17 | var client = MIDIClientRef()
 18 | var source = MIDIEndpointRef()
 19 | 
 20 | MIDIClientCreate("GenerativeMusic" as CFString, nil, nil, &client)
 21 | MIDISourceCreate(client, "Evolution" as CFString, &source)
 22 | 
 23 | sleep(1)    //wait until midi is set up
 24 | 
 25 | // Helper function to send midi notes.
 26 | func midiOut(_ status:Int, byte1: Int, byte2:Int) {
 27 |     var packet = UnsafeMutablePointer<MIDIPacket>.allocate(capacity: 1)
 28 |     let packetList = UnsafeMutablePointer<MIDIPacketList>.allocate(capacity: 1)
 29 |     let midiDataToSend:[UInt8] = [UInt8(status), UInt8(byte1), UInt8(byte2)];
 30 |     packet = MIDIPacketListInit(packetList);
 31 |     packet = MIDIPacketListAdd(packetList, 1024, packet, 0, 3, midiDataToSend);
 32 |     
 33 |     MIDIReceived(source, packetList)
 34 |     packet.deinitialize(count: 1)
 35 |     packetList.deinitialize(count: 1)
 36 |     packetList.deallocate()
 37 | }
 38 | 
 39 | //number generator
 40 | srand48(seed)
 41 | func random(_ limit: Int)->Int {
 42 |     let limit = Double(limit) - 1
 43 |     return Int(round(drand48()*limit))
 44 | }
 45 | 
 46 | let name = ["C","C♯","D","D♯","E","F","F♯","G","G♯","A","A♯","B"]
 47 | 
 48 | // Timer is used to call back at the correct temp time to send the midi.
 49 | var timer: Timer?
 50 | 
 51 | //
 52 | /*
 53 |     Each mode is a unique set of 7 notes based on the diatonic scale.
 54 |     Evolution slowly evolves from lightest to darkest mode in each
 55 |     key by changing one note at a time in the following order.
 56 |     Lydian->Ionian->Mixolydian->Dorian->Aeolian->Phrygian->Locrian.
 57 |     Following the arrival at Locrian the same pattern will continue
 58 |     with the bass a half-step lower.
 59 |  */
 60 | 
 61 | var key = 0
 62 | var mode = [0,2,4,6,7,9,11] // starting mode
 63 | var alterations = [3,6,2,5,1,4,0] // order of alterations
 64 | var ostinato = [0,1,2,3,4,5,6].shuffled()
 65 | var melody = random(7)
 66 | 
 67 | var beat = 0
 68 | var bar = 0
 69 | var currentMode = 0
 70 | 
 71 | 
 72 | // initial pedal down
 73 | midiOut(0b10110000, byte1: 64, byte2: 127) // pedal on
 74 | 
 75 | timer = Timer.scheduledTimer(withTimeInterval: 60.0/(tempo*7.0), repeats: true) { _ in
 76 |     
 77 |     // Put Ostinato in right octave
 78 |     var note = mode[ostinato[beat]]
 79 |     if note < 0 {
 80 |         note = 12 - note
 81 |     }
 82 |     print(name[note])
 83 |     note += 60
 84 |     
 85 |     
 86 |     // Play Ostinato
 87 |     midiOut(144, byte1: note, byte2: random(32)+24)
 88 |     
 89 |     // turn note off after 0.1 seconds
 90 |     Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false) { _ in
 91 |         midiOut(144, byte1: note, byte2: 0)
 92 |     }
 93 | 
 94 |     
 95 |     // Play Bass Notes
 96 |     if bar%28 == 0 && beat == 0 {
 97 |         
 98 |         let bassNote = key + 36
 99 |         
100 |         // turn on new bass notes
101 |         midiOut(145, byte1: bassNote + 12, byte2: random(32)+32)
102 |         
103 |     }
104 |     
105 |     if bar%4 == 0 && beat == 0 {
106 |         // change pedal
107 |         midiOut(0b10110000, byte1: 64, byte2: 0) // pedal off
108 | 
109 |         // turn pedal on after 0.09 seconds
110 |         Timer.scheduledTimer(withTimeInterval: 0.1, repeats: false) { _ in
111 |             midiOut(0b10110000, byte1: 64, byte2: 127) // pedal on
112 |         }
113 |         
114 |         // Alter notes of mode
115 |         mode[alterations[currentMode]] -= 1
116 |         
117 |         // Notes must be 0-11.
118 |         if mode[alterations[currentMode]] < 0 {
119 |             mode[alterations[currentMode]] = 11
120 |         }
121 |         
122 |         // Change mode
123 |         currentMode += 1
124 |         
125 |         // There are only 7 modes.
126 |         if currentMode == 7 {
127 |             currentMode = 0
128 |             
129 |             // Change Key when we go back to the first mode.
130 |             key -= 1
131 |             
132 |             // Key must be 0-11.
133 |             if key < 0 {
134 |                 key == 11
135 |             }
136 |         }
137 |     }
138 |     
139 |     
140 |     // Move to next beat. 0-6
141 |     beat += 1
142 |     if beat == 7 {
143 |         beat = 0
144 |         
145 |         // Move to next bar. 0-3
146 |         bar += 1
147 |     }
148 | }
149 | 
150 | PlaygroundPage.current.needsIndefiniteExecution = true
151 | 


--------------------------------------------------------------------------------
/Evolution.playground/contents.xcplayground:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2 | <playground version='5.0' target-platform='macos'>
3 |     <timeline fileName='timeline.xctimeline'/>
4 | </playground>


--------------------------------------------------------------------------------
/Evolution.playground/playground.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/Evolution.playground/playground.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
3 | <plist version="1.0">
4 | <dict>
5 | 	<key>IDEDidComputeMac32BitWarning</key>
6 | 	<true/>
7 | </dict>
8 | </plist>
9 | 


--------------------------------------------------------------------------------
/Evolution.playground/playground.xcworkspace/xcuserdata/Devin.xcuserdatad/UserInterfaceState.xcuserstate:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/devinroth/GenerativeMusic/0517e24ff421908297392f48fb7f07236aa8a2d5/Evolution.playground/playground.xcworkspace/xcuserdata/Devin.xcuserdatad/UserInterfaceState.xcuserstate


--------------------------------------------------------------------------------
/Evolution.playground/playground.xcworkspace/xcuserdata/rot.xcuserdatad/UserInterfaceState.xcuserstate:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/devinroth/GenerativeMusic/0517e24ff421908297392f48fb7f07236aa8a2d5/Evolution.playground/playground.xcworkspace/xcuserdata/rot.xcuserdatad/UserInterfaceState.xcuserstate


--------------------------------------------------------------------------------
/JazzCycle.playground/Contents.swift:
--------------------------------------------------------------------------------
  1 | //Copyright (c) 2016 Devin Roth
  2 | 
  3 | import Foundation
  4 | import CoreMIDI
  5 | 
  6 | //control variables
  7 | var seed = 1
  8 | var tempo = 120
  9 | var complexity = 0.5
 10 | 
 11 | 
 12 | //midi setup
 13 | var client = MIDIClientRef()
 14 | var source = MIDIEndpointRef()
 15 | 
 16 | MIDIClientCreate("Jazz" as CFString, nil, nil, &client)
 17 | MIDISourceCreate(client, "Jazz Out" as CFString, &source)
 18 | 
 19 | sleep(1)    //wait until midi is setup
 20 | 
 21 | func midiOut(_ status:Int, byte1: Int, byte2:Int) {
 22 |     var packet = UnsafeMutablePointer<MIDIPacket>.allocate(capacity: 1)
 23 |     let packetList = UnsafeMutablePointer<MIDIPacketList>.allocate(capacity: 1)
 24 |     let midiDataToSend:[UInt8] = [UInt8(status), UInt8(byte1), UInt8(byte2)];
 25 |     packet = MIDIPacketListInit(packetList);
 26 |     packet = MIDIPacketListAdd(packetList, 1024, packet, 0, 3, midiDataToSend);
 27 |     
 28 |     MIDIReceived(source, packetList)
 29 |     packet.deinitialize()
 30 |     packetList.deinitialize()
 31 |     packetList.deallocate(capacity: 1)
 32 | }
 33 | 
 34 | //number generator
 35 | srand48(seed)
 36 | func random(_ limit: Int)->Int {
 37 |     let limit = Double(limit) - 1
 38 |     return Int(round(drand48()*limit))
 39 | }
 40 | 
 41 | //piano notes
 42 | var piano:[[Int?]] = [
 43 |     [nil,    nil,   nil,    nil,    nil,    nil ],
 44 |     [nil,    nil,   nil,    nil,    5,      nil ],
 45 |     [nil,    nil,   nil,    nil,    6,      -1  ],
 46 |     [nil,    4,     nil,    nil,    1,      nil ],
 47 |     [nil,    nil,   nil,    nil,    4,      1   ],
 48 |     [nil,    nil,   4,      nil,    1,      nil ],
 49 |     [nil,    nil,   4,      nil,    nil,    1   ],
 50 |     [nil,    8,     nil,    nil,    -2,     -1  ],
 51 |     [nil,    nil,   nil,    nil,    nil,    nil ],
 52 |     [nil,    3,     5,      nil,    -2,     -1  ],
 53 |     [nil,    9,     -1,     nil,    -2,     -1  ],
 54 |     [nil,    6,     -3,     nil,    1,      1   ],
 55 |     [nil,    nil,   nil,    nil,    nil,    nil ],
 56 |     [nil,    3,     3,      nil,    -2,     1   ],
 57 |     [nil,    1,     2,      nil,    1,      1   ],
 58 |     [nil,    10,    -2,     nil,    -2,     -1  ],
 59 |     [nil,    7,     -1,     nil,    -2,     1   ],
 60 |     [nil,    4,     -1,     nil,    3,      -1  ],
 61 |     [nil,    nil,   nil,    nil,    nil,    nil ],
 62 |     [nil,    3,     nil,    3,      -2,     1   ],
 63 |     [1,     1,     1,       nil,    3,     -1   ],
 64 |     [1,     1,     1,       3,      -2,     1   ],
 65 |     
 66 | ]
 67 | var pianoNote = 64
 68 | 
 69 | var pianoChords = [[4,10,14],[-2,4,9]]
 70 | 
 71 | //bass notes
 72 | var bass = [0,5,-2,3,-4,1,6,-1,4,-3,2,-5]
 73 | var bassNote = 0
 74 | 
 75 | //drum rhythms
 76 | var ride:[[Bool]] = [
 77 |     [false,false,false,false,false,false],
 78 |     [false,false,false,false,false,true],
 79 |     [false,false,false,false,true,true],
 80 |     [false,false,true,false,true,true]
 81 | ]
 82 | 
 83 | var chord = pianoChords[bassNote%2]
 84 | 
 85 | //main loop
 86 | while true {
 87 |     
 88 |     //select patterns
 89 |     var pianoPattern = random(piano.count )
 90 |     if pianoPattern == 0 {
 91 |         pianoNote += 5
 92 |     }
 93 |     var ridePattern = random(ride.count)
 94 |     
 95 |     
 96 |     //play notes
 97 |     for i in 0..<6 {
 98 |         
 99 |         //piano solo note on
100 |         if let note = piano[pianoPattern][i]{
101 |             midiOut(144, byte1: pianoNote + 12, byte2: 0)
102 |             midiOut(144, byte1: pianoNote - 12, byte2: 0)
103 |             midiOut(144, byte1: pianoNote, byte2: 0)
104 |             pianoNote = pianoNote + note
105 |             print(pianoNote)
106 |             midiOut(144, byte1: pianoNote, byte2: 35 + random(60))
107 |         }
108 |         
109 |         // piano chords
110 |         if i == 1 && random(4) == 0 {
111 |             //piano chords off
112 |             for note in chord {
113 |                 midiOut(144, byte1: note + bass[bassNote] + 48, byte2: 0)
114 |             }
115 |             var chordVelocity = 30 + random(50)
116 |             for note in chord {
117 |                 midiOut(144, byte1: note + bass[bassNote] + 48, byte2: chordVelocity )
118 |             }
119 |         }
120 |         if i == 4 {
121 |             if bassNote < 6 {
122 |                 chord = pianoChords[bassNote%2]
123 |             } else {
124 |                 chord = pianoChords[1 - bassNote%2]
125 |             }
126 |             var chordVelocity = 20 + random(50)
127 |             for note in chord {
128 |                 midiOut(144, byte1: note + bass[bassNote] + 48, byte2: chordVelocity)
129 |             }
130 |         }
131 |         
132 |         //drums
133 |         if ride[ridePattern][i] == true {
134 |             midiOut(146, byte1: 54, byte2: 20 + random(40)) //ride on
135 |             midiOut(146, byte1: 54, byte2: 0) //ride off
136 |         }
137 |         if i == 2 {
138 |             midiOut(146, byte1: 52, byte2: 30 + random(40)) //hh on
139 |             midiOut(146, byte1: 52, byte2: 0) //hh off
140 |         }
141 |         
142 |         //bass
143 |         if i == 2 {
144 |             midiOut(145, byte1: bass[bassNote]+48, byte2: 0) //bass note off
145 |             
146 |             //reset bass notes
147 |             bassNote += 1
148 |             if bassNote == 12 {
149 |                 bassNote = 0
150 |             }
151 |             
152 |             var rand = random(3)
153 |             if rand == 0 {
154 |                 midiOut(145, byte1: bass[bassNote]+48-1, byte2: 50) //bass note on
155 |             }
156 |             if rand == 1 {
157 |                 midiOut(145, byte1: bass[bassNote]+48+1, byte2: 50) //bass note on
158 |             }
159 |         }
160 |         if i == 4 {
161 |             var rand = random(4)
162 |             if rand == 0 {
163 |                 midiOut(145, byte1: bass[bassNote]+48-1, byte2: 50) //bass note on
164 |             }
165 |             if rand == 1 {
166 |                 midiOut(145, byte1: bass[bassNote]+48+1, byte2: 50) //bass note on
167 |             }
168 |         }
169 |         if i == 5 {
170 |             midiOut(145, byte1: bass[bassNote]+48-1, byte2: 0) //bass note off
171 |             midiOut(145, byte1: bass[bassNote]+48+1, byte2: 0) //bass note off
172 |             midiOut(145, byte1: bass[bassNote]+48, byte2: 50) //bass note on
173 |         }
174 |         
175 |         //set time between notes
176 |         if i == 2 || i == 5 {
177 |            usleep(useconds_t((60_000_000*1)/(tempo*3)))
178 |         }
179 |         if i == 0 || i == 3 {
180 |             usleep(useconds_t((60_000_000*4)/(tempo*15)))
181 |         }
182 |         if i == 1 || i == 4 {
183 |             usleep(useconds_t((60_000_000*2)/(tempo*5)))
184 |         }
185 |         
186 |         //piano chords off
187 |         for note in chord {
188 |             midiOut(144, byte1: note + bass[bassNote] + 48, byte2: 0)
189 |         }
190 |     }
191 |     
192 |     //control the range of piano notes
193 |     if pianoNote > 90 {
194 |         pianoNote -= 12
195 |     } else if pianoNote < 60 {
196 |         pianoNote += 12
197 |     } else {
198 |         pianoNote = pianoNote - 12 * random(2)
199 |     }
200 | }
201 | 
202 | 
203 | //0 = 0-0
204 | //50 = 0-20
205 | //100 = 20-20
206 | 
207 | //0 = -20...0
208 | //50 = 0 - 20
209 | //100 = 20 - 40
210 | 
211 | //var offset = 10.0
212 | //var values = 10.0
213 | //20.0/100.0 * values
214 | 
215 | 
216 | 
217 | 
218 | 
219 | 


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/JazzCycle.playground/contents.xcplayground:
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1 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2 | <playground version='5.0' target-platform='macos'>
3 |     <timeline fileName='timeline.xctimeline'/>
4 | </playground>


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
  1 |                     GNU GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
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561 | combination as such.
562 | 
563 |   14. Revised Versions of this License.
564 | 
565 |   The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time.  Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 | 
570 |   Each version is given a distinguishing version number.  If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation.  If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 | 
579 |   If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 | 
584 |   Later license versions may give you additional or different
585 | permissions.  However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 | 
589 |   15. Disclaimer of Warranty.
590 | 
591 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 | 
600 |   16. Limitation of Liability.
601 | 
602 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 | 
612 |   17. Interpretation of Sections 15 and 16.
613 | 
614 |   If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 | 
621 |                      END OF TERMS AND CONDITIONS
622 | 
623 |             How to Apply These Terms to Your New Programs
624 | 
625 |   If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 | 
629 |   To do so, attach the following notices to the program.  It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 | 
634 |     <one line to give the program's name and a brief idea of what it does.>
635 |     Copyright (C) <year>  <name of author>
636 | 
637 |     This program is free software: you can redistribute it and/or modify
638 |     it under the terms of the GNU General Public License as published by
639 |     the Free Software Foundation, either version 3 of the License, or
640 |     (at your option) any later version.
641 | 
642 |     This program is distributed in the hope that it will be useful,
643 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
644 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645 |     GNU General Public License for more details.
646 | 
647 |     You should have received a copy of the GNU General Public License
648 |     along with this program.  If not, see <https://www.gnu.org/licenses/>.
649 | 
650 | Also add information on how to contact you by electronic and paper mail.
651 | 
652 |   If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 | 
655 |     <program>  Copyright (C) <year>  <name of author>
656 |     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 |     This is free software, and you are welcome to redistribute it
658 |     under certain conditions; type `show c' for details.
659 | 
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License.  Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 | 
664 |   You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | <https://www.gnu.org/licenses/>.
668 | 
669 |   The GNU General Public License does not permit incorporating your program
670 | into proprietary programs.  If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library.  If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License.  But first, please read
674 | <https://www.gnu.org/licenses/why-not-lgpl.html>.
675 | 


--------------------------------------------------------------------------------
/Moonlight.playground/Contents.swift:
--------------------------------------------------------------------------------
  1 | //Copyright (c) 2016 Devin Roth
  2 | 
  3 | import Foundation
  4 | import CoreMIDI
  5 | 
  6 | //master controls
  7 | var seed = 0
  8 | var tempo = 60
  9 | 
 10 | //midi setup
 11 | var client = MIDIClientRef()
 12 | var source = MIDIEndpointRef()
 13 | 
 14 | MIDIClientCreate("GenerativeMusic" as CFString, nil, nil, &client)
 15 | MIDISourceCreate(client, "Moonlight" as CFString, &source)
 16 | 
 17 | sleep(1)    //wait until midi is set up
 18 | 
 19 | func midiOut(_ status:Int, byte1: Int, byte2:Int) {
 20 |     var packet = UnsafeMutablePointer<MIDIPacket>.allocate(capacity: 1)
 21 |     let packetList = UnsafeMutablePointer<MIDIPacketList>.allocate(capacity: 1)
 22 |     let midiDataToSend:[UInt8] = [UInt8(status), UInt8(byte1), UInt8(byte2)];
 23 |     packet = MIDIPacketListInit(packetList);
 24 |     packet = MIDIPacketListAdd(packetList, 1024, packet, 0, 3, midiDataToSend);
 25 |     
 26 |     MIDIReceived(source, packetList)
 27 |     packet.deinitialize()
 28 |     packetList.deinitialize()
 29 |     packetList.deallocate(capacity: 1)
 30 | }
 31 | 
 32 | //number generator
 33 | srand48(seed)
 34 | func random(_ limit: Int)->Int {
 35 |     let limit = Double(limit) - 1
 36 |     return Int(round(drand48()*limit))
 37 | }
 38 | 
 39 | //chord generator
 40 | func generateChord()->[Int]{
 41 |     let root = random(12)
 42 |     let third = root + 3 + random(2)
 43 |     let fifth = root + 7
 44 | 
 45 |     return [root,third,fifth]
 46 |     
 47 | }
 48 | //melody generator
 49 | func generateMelody(_ chord: [Int]) -> Int {
 50 |     var melody = chord[random(3)] + 72
 51 |     if melody > 84 {
 52 |         melody -= 12
 53 |     }
 54 |     return melody
 55 | }
 56 | //voice chord
 57 | func createVoicing(_ chord: [Int]) -> [Int] {
 58 |     var voicing = chord
 59 |     for note in 0..<voicing.count {
 60 |         voicing[note] += 48
 61 |         if voicing[note] > 60 {
 62 |             voicing[note] -= 12
 63 |         }
 64 |     }
 65 |     return voicing.sorted()
 66 | }
 67 | 
 68 | while true {
 69 |     var chord = generateChord()
 70 |     var voicing = createVoicing(chord)
 71 |     
 72 |     //melody note
 73 |     var melody = generateMelody(chord)
 74 |     var melodyVelocity = 40 + random(20)
 75 |     midiOut(144, byte1: melody, byte2: melodyVelocity) // melody note on
 76 |     
 77 |     //bass note
 78 |     var bass = chord[0] + 36
 79 |     var bassVelocity = 20 + random(20)
 80 |     midiOut(144, byte1: bass, byte2: bassVelocity) // bass note on
 81 |     
 82 |     for beat in 1...4 {
 83 |         
 84 |         if beat == 3 {
 85 |             if random(2) == 0 {
 86 |                 midiOut(144, byte1: melody, byte2: 0) // melody note off
 87 |                 var melody = generateMelody(chord)
 88 |                 midiOut(144, byte1: melody, byte2: melodyVelocity - 5) // melody note on
 89 |             }
 90 |         }
 91 |         
 92 |         for triplet in 1...3 {
 93 |             
 94 |             if beat == 4 && triplet == 3 {
 95 |                 if random(3) == 0 {
 96 |                     midiOut(144, byte1: melody, byte2: 0) // melody note off
 97 |                     var melody = generateMelody(chord)
 98 |                     midiOut(144, byte1: melody, byte2: melodyVelocity - 10) // melody note on
 99 |                 }
100 |             }
101 |             
102 |             midiOut(144, byte1: voicing[triplet - 1], byte2: 20 + random(20)) // voicing note on
103 |             
104 |             usleep(useconds_t(20000000/tempo))
105 |             
106 |             midiOut(0b10110000, byte1: 64, byte2: 127) // pedal on
107 |             midiOut(144, byte1: voicing[triplet - 1], byte2: 0) // voicing note off
108 |         }
109 |     }
110 |     
111 |     midiOut(144, byte1: melody, byte2: 0)
112 |     midiOut(144, byte1: bass, byte2: 0)
113 |     midiOut(0b10110000, byte1: 64, byte2: 0) // pedal off
114 | }
115 | 
116 | 


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/Moonlight.playground/contents.xcplayground:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2 | <playground version='5.0' target-platform='macos'>
3 |     <timeline fileName='timeline.xctimeline'/>
4 | </playground>


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # GenerativeMusic
 2 | 
 3 | License: GNU General Public License v3.0. Free to use for open source projects. 
 4 | 
 5 | The goal of this project is to create generative music based on specific style using Swift Playground on macOS.
 6 | 
 7 | For this project the algorithms produce a midi output which is routed to Kontakt and played back with virtual instruments. I view each algorithm as a separate musical work. 
 8 | 
 9 | ## JazzCycle
10 | 
11 | JazzCycle follows a common jazz improvisation exersice on the circle of fifths.
12 | 
13 | [![YouTube Thumbnail](http://img.youtube.com/vi/1q921-EMoXw/1.jpg)](https://youtu.be/1q921-EMoXw)
14 | 
15 | ## Moonlight
16 | 
17 | Inspired by Beethoven's Moonlight Sonata, this algorithm creates a lyrical melody accompianed by randomly generated broken chords. 
18 | 
19 | [![YouTube Thumbnail](http://img.youtube.com/vi/esRdmKYucIw/1.jpg)](https://youtu.be/esRdmKYucIw)
20 | 
21 | ## Evolution
22 | 
23 | Evolution follow a cyclical progression of all keys and modes. 
24 | 
25 | [![YouTube Thumbnail](http://img.youtube.com/vi/-9r8N2iaL4o/1.jpg)](https://youtu.be/-9r8N2iaL4o)
26 | 


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