amsel-core (composition tool)· Jun 2019

A software module for generative composition producing monophonic phrases, organized into parts and influenced by probability sequences. "Tool" is stressed here because its aim is to be playable in a live context.

I've used it myself for idea generation and jamming while producing music.

Example usage (swift/command line):

    func playFlutyMelody(output: MIDIOutput?) -> Void {

        // Make a sheet
        let aMinPent = Part(root: Note(69), scale: scales["pent-min"]!, length: 16)
        let dMinPent = Part(root: Note(62), scale: scales["pent-min"]!, length: 16)
        let cMajPent = Part(root: Note(60), scale: scales["pent-maj"]!, length: 16)
        let fMajPent = Part(root: Note(53), scale: scales["pent-maj"]!, length: 16)
        let sheetMelo  = Sheet(parts: [aMinPent, dMinPent, cMajPent, fMajPent])

        // Give it to the player
        var player = Player(sheet: sheetMelo)

        // Instruct the player
        player.behavior.favoredNoteLength       = .Eighth
        player.behavior.noteOrRestProbabiltySeq = [0.5, 0.5]

        let allowedRests: [Duration]            = [.Eighth, .Quarter]
        let allowedRestsProbs: [Probability]    = [0.7,     0.3     ]

        // Generate the melody
        let melody = player.generateMelodyFromSheet(allowedRest: allowedRests, 
                                                    restProbs: allowedRestsProbs)

        // Play the melody
        for event in melody.events {
            sendWithRandomVelocity(melodyEvent: event, sendTo: output, tempo: 60)
        }
    }

Schematic ↗