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Music generated from the Fibonacci sequence and output to midi
import midi
# Music generated from the Fibonacci sequence and output to midi
# Inspired by https://dev.to/daniel40392/visualizing-fibonacci-for-the-music-lover-in-you-2609
# Using https://github.com/vishnubob/python-midi for midi output
# Please excuse any python or music theory mistakes, I'm not an expert at either
print('Welcome to the Fibonacci Composer.')
x = int(input('Enter Song Length: '))
k = input('Enter Song Key (C, G, D, A, E, B, F#, Db, Ab, Eb, Bb, F): ')
q = input('Enter Key Quality (maj, min): ')
keys = {
'C': ["C","D","E","F","G","A","B"],
'G': ["G","A","B","C","D","E","F#"],
'D': ["D","E","F#","G","A","B","C#"],
'A': ["A","B","C#","D","E","F#","G#"],
'E': ["E","F#","G#","A","B","C#","D#"],
'B': ["B","C#","D#","E","F#","G#","A#"],
'F#': ["F#","G#","A#","B","C#","D#","E#"],
'Db': ["Db","Eb","F","Gb","Ab","Bb","C"],
'Ab': ["Ab","Bb","C","Db","Eb","F","G"],
'Eb': ["Eb","F","G","Ab","Bb","C","D"],
'Bb': ["Bb","C","D","Eb","F","G","A"],
'F': ["F","G","A","Bb","C","D","E"]
}
relatives = {
'A': 'C',
'E': 'G',
'B': 'D',
'F#': 'A',
'Db': 'E',
'Ab': 'B',
'Eb': 'F#',
'Bb': 'Db',
'F': 'Ab',
'C': 'Eb',
'G': 'Bb',
'D': 'F'
}
pitches = {
'C': midi.C_3,
'G': midi.G_3,
'D': midi.D_3,
'A': midi.A_3,
'E': midi.E_3,
'B': midi.B_3,
'F#': midi.Fs_3,
'Gb': midi.Fs_3,
'C#': midi.Cs_3,
'Db': midi.Cs_3,
'G#': midi.Gs_3,
'Ab': midi.Gs_3,
'D#': midi.Ds_3,
'Eb': midi.Ds_3,
'A#': midi.As_3,
'Bb': midi.As_3,
'E#': midi.F_3,
'F': midi.F_3
}
key = keys[k] if q=='maj' else keys[relatives[k]]
song = []
def fib(n):
"""Function that generates notes based off the Fibonnachi Series"""
a=0
b=1
print('Fibonacci in ' + str(k) + str(q) + ': ', end=' ')
first = 0 if q=='maj' else 5
song.append(key[first])
for i in range (1,n):
fib=a+b
mod = fib%7 - 1 if fib%7 - 1 >=0 else 6
mod = mod if q=='maj' else (mod+5)%7
song.append(key[mod])
a=b
b=fib
for i in song:
print (i + ', ', end='')
print('\n')
to_midi(song, 'fibonacci-' + str(k) + str(q) + '.mid')
def to_midi(song, filename):
pattern = midi.Pattern()
track = midi.Track()
pattern.append(track)
for i in song:
on = midi.NoteOnEvent(tick=0, velocity=60, pitch=pitches[i])
track.append(on)
off = midi.NoteOffEvent(tick=100, pitch=pitches[i])
track.append(off)
eot = midi.EndOfTrackEvent(tick=1)
track.append(eot)
midi.write_midifile(filename, pattern)
while x != '':
fib(x)
print()
quit()
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