Generate Synthwave MIDI Files with Music21 Python: Chord Progressions & Example

Sure! Here's an example script that uses the music21 python module to generate a MIDI file with synthwave chords in a specified progression:
\

from music21 import *\
\
def generate_midi_with_synthwave_chords(progression, output_file):\
    # Create a new MIDI stream\
    stream = stream.Stream()\
    \
    # Define the chords in the synthwave progression\
    chords = {'I': ['C4', 'E4', 'G4', 'B4'],\
              'ii': ['D4', 'F4', 'A4', 'C5'],\
              'iii': ['E4', 'G4', 'B4', 'D5'],\
              'IV': ['F4', 'A4', 'C5', 'E5'],\
              'V': ['G4', 'B4', 'D5', 'F5'],\
              'vi': ['A4', 'C5', 'E5', 'G5'],\
              'vii': ['B4', 'D5', 'F5', 'A5']}\
    \
    # Iterate through the progression and add the corresponding chords to the stream\
    for chord_symbol in progression: \
        chord_notes = [note.Note(chord_note) for chord_note in chords[chord_symbol]]\
        chord = chord.Chord(chord_notes) \
        stream.append(chord) \
    \
    # Add a piano instrument to the stream\
    piano = instrument.Piano()\
    stream.insert(0, piano) \
    \
    # Write the stream to a MIDI file \
    stream.write('midi', fp=output_file) \
    \
    print(f'MIDI file generated successfully: {output_file}')\
\
# Specify the progression\
progression = ['I', 'vi', 'IV', 'V']\
\
# Specify the output file name\
output_file = 'synthwave_chords.mid'\
\
# Generate the MIDI file\
generate_midi_with_synthwave_chords(progression, output_file) \
```\
\
In this example, the `generate_midi_with_synthwave_chords` function takes in a list of chord symbols representing a chord progression and an output file name. It then creates a new MIDI stream, adds the corresponding synthwave chords to the stream, inserts a piano instrument, and writes the stream to the specified MIDI file. \
\
You can customize the `chords` dictionary to include different synthwave chord progressions or modify the script as per your requirements.