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node.rs

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    • midiMaker.py 4.31 KiB
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    #!/usr/bin/env python

from midiutil import MIDIFile
import random
random.seed()
scale  = [48, 50, 52, 53, 55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72, 74, 76, 77, 79, 81, 83]
#scale  = [48, 50, 51, 53, 55, 56, 58, 60, 62, 63, 65, 67, 68, 70, 72, 74, 75, 77, 79, 80, 82] 
track    = 0
channel  = 0
trackTime = 0
time = 0
duration = 1    
tempo    = 60  
volume   = 100 
MyMIDI = MIDIFile(1)  
                      
MyMIDI.addTempo(track, time, tempo)
def addMotif(pitch, time, trackTime):
    for i in range(0, len(pitch)):
        MyMIDI.addNote(track, channel, pitch[i], trackTime + time[i], duration, volume)
    return trackTime + time[len(time)-1]

def createMotif():
    length = random.randint(5, 10)
    motifPitch = []
    motifTime = []
    previous = 60
    upPercent = 50
    consecutive = 1
    time = 0
    previousJump = 0
    previousTimeInterval = 0
    for i in range(0, length):
        intervalType = random.randint(0, 100)
        upDown = random.randint(0,100)
        y = scale.index(previous)
        if upDown > upPercent:
            upDown = -1
            upPercent += 2 * consecutive
            consecutive += 1
        else:
            upDown = 1
            upPercent += -2 * consecutive
            consecutive += 1
        y = scale.index(previous)
        try:
            if intervalType <= 25:
                pitch = previous
            elif intervalType <= 27:
                upDown = -1 * previousJump
                pitch = scale[y + 7*upDown]
            elif intervalType <= 75:
                pitch = scale[y + 1*upDown]
            else:
                skipInterval = random.randint(0, 100)
                if intervalType <= 25:
                    pitch = scale[y + 4*upDown]
                elif intervalType <= 27:
                    pitch = scale[y + 3*upDown]
                elif intervalType <= 75:
                    pitch = scale[y + 2*upDown]
                else:
                    pitch = scale[y + 5*upDown]
        except IndexError:
            upDown *= -1
            if intervalType <= 25:
                pitch = previous
            elif intervalType <= 27:
                pitch = scale[y + 7*upDown]
            elif intervalType <= 75:
                pitch = scale[y + 1*upDown]
            else:
                skipInterval = random.randint(0, 100)
                if intervalType <= 25:
                    pitch = scale[y + 4*upDown]
                elif intervalType <= 27:
                    pitch = scale[y + 3*upDown]
                elif intervalType <= 75:
                    pitch = scale[y + 2*upDown]
                else:
                    pitch = scale[y + 5*upDown]
        timeInterval = random.randint(0, 100)
        if timeInterval <= 10:
            if previousTimeInterval == 1:
                time = time + 1/4
                previousTimeInterval = 1/4
            else:
                time = time + 1/16
                previousTimeInterval = 1/16
        elif timeInterval <= 41:
            if previousTimeInterval == 1:
                time = time + 1/4
                previousTimeInterval = 1/4
            else:
                time = time + 1/8
                previousTimeInterval = 1/8
        elif timeInterval <= 81:
            time = time + 1/4
            previousTimeInterval = 1/4
        elif timeInterval <= 88:
            time = time + 1/4 + 1/8
            previousTimeInterval = 1/8 + 1/4
        elif timeInterval <= 97:
            if previousTimeInterval == 1/16:
                time = time + 1/4
                previousTimeInterval = 1/4
            else:
                time = time + 1/2
                previousTimeInterval = 1/2
        elif timeInterval <= 100:
            if previousTimeInterval == 1/16:
                time = time + 1/2
                previousTimeInterval = 1/2
            else:
                time = time + 1
                previousTimeInterval = 1
        motifPitch.append(pitch)
        motifTime.append(time)
        previous = pitch
        previousJump = upDown
    return motifPitch, motifTime
    
x, y = createMotif()
a, b = createMotif()
c, d = createMotif()
trackTime = addMotif(x, y, trackTime)
trackTime = addMotif(x, y, trackTime)
trackTime = addMotif(a, b, trackTime)
trackTime = addMotif(a, b, trackTime)
trackTime = addMotif(c, d, trackTime)

with open("random.mid", "wb") as output_file:
    MyMIDI.writeFile(output_file)