Random Melody Generator

Generate random melody under specific rules.

Getting started

Prerequisites

This project is written in Python 3.6. I haven't tested in other versions.

MIDIUtil library is used in my project. You can install it simply by using pip:

pip install MIDIUtil

How to use?

Simply run main.py. A standard MIDI file will be generated in output folder. The filename is midi_{timestamp}.mid.

You can play it using a media player (e.g. Windows Media Player) or import it into a Digital Audio Workstation (DAW).

Customize

By default, the melody is in major pentatonic scale, chord progression is C-Am-F-G (1-6-4-5), and percussion pattern is fixed. Also, the interval of notes within a phrase is constrained.

The rules can be modified in rules.json.

You can also adjust the length of song and tempo in song_settings.json.

rules.json

song_settings.json

Credits

• The whole project is written in Python (python.org).
• The project uses MIDIUtil library by MarkCWirt.
• I would appreciate ScoreDraft by fynv. My project is partially inspired by ScoreDraft. Since ScoreDraft uses scripts to compose music, I found its potential to automatically generate music. My algorithm of randomly generating melody was initially tested on ScoreDraft.