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@@ -0,0 +1,84 @@
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+#!/usr/bin/env python
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+
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+from midiutil import MIDIFile
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+from mingus.core import chords
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+
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+NOTES = ['C', 'C#', 'D', 'Eb', 'E', 'F', 'F#', 'G', 'Ab', 'A', 'Bb', 'B']
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+OCTAVES = list(range(11))
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+NOTES_IN_OCTAVE = len(NOTES)
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+
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+errors = {
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+ 'notes': 'Bad input please refer this spec-\n',
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+}
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+
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+def swap_accidentals(note):
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+ match note:
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+ case 'Db':
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+ return 'C#'
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+ case 'D#':
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+ return 'Eb'
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+ case 'E#':
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+ return 'F'
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+ case 'Gb':
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+ return 'F#'
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+ case 'G#':
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+ return 'Ab'
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+ case 'A#':
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+ return 'Bb'
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+ case 'B#':
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+ return 'C'
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+ case _:
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+ return note
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+
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+def note_to_number(note: str, octave: int) -> int:
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+ note = swap_accidentals(note)
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+ assert note in NOTES, errors['notes']
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+ assert octave in OCTAVES, errors['notes']
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+
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+ notenum = NOTES.index(note)
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+ notenum += (NOTES_IN_OCTAVE * octave)
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+
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+ assert 0 <= notenum <= 127, errors['notes']
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+
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+ return notenum
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+
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+
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+chord_progression = ["Cmaj7", "Cmaj7", "Fmaj7", "Gdom7"]
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+
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+arpeggio_notes = []
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+bass_notes = []
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+
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+for chord in chord_progression:
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+ arpeggio_notes.extend(chords.from_shorthand(chord))
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+ bass_notes.append(chords.from_shorthand(chord)[0])
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+
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+arpeggio_octave = 4
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+arpeggio_nums = [note_to_number(x, arpeggio_octave) for x in arpeggio_notes]
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+
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+bass_octave = 3
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+bass_nums = [note_to_number(x, bass_octave) for x in bass_notes]
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+
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+arpeggio_track = 0
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+bass_track = 1
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+channel = 0
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+time = 0 # in beats
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+arpeggio_duration = 1 # in beats
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+bass_duration = 4 # in beats
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+tempo = 120 # in BPM
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+volume = 100 # 0-127
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+
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+MyMIDI = MIDIFile(2) # two tracks, defaults to format 1
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+ # tempo track is created automatically
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+MyMIDI.addTempo(arpeggio_track, time, tempo)
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+
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+for i, pitch in enumerate(arpeggio_nums):
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+ MyMIDI.addNote(arpeggio_track, channel, pitch, time + i, arpeggio_duration, volume)
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+
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+for i, pitch in enumerate(bass_nums):
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+ MyMIDI.addNote(bass_track, channel, pitch, time + (i*4), bass_duration, volume)
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+
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+
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+with open("pure-edm-fire-arpeggio.mid", "wb") as output_file:
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+ MyMIDI.writeFile(output_file)
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+
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+# print(arpeggio_notes)
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