Uploaded November 2023 | Updated September 2026, 2 weeks ago

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We implement an L-System that generates chord progressions in Python.

Get the code:
github.com/musikalkemist/generativemusicaicourse/blob/main/10.%20Chord%20generation%20with%20generative%20grammars/Code/lsystem.py

Get the lecture slides:
github.com/musikalkemist/generativemusicaicourse/blob/main/10.%20Chord%20generation%20with%20generative%20grammars/Slides/10.%20Chord%20generation%20with%20generative%20grammars.pdf

Website of the Generative Music AI Workshop in Barcelona:
https://www.upf.edu/web/mtg/generative-music-ai-workshop

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valeriovelardo.com/the-sound-of-ai-community

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the-sound-of-ai-academy.teachable.com/p/advanced-python-programming

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Content
0:00 Intro
0:32 L-System design
2:13 Music21
2:54 Code repository
3:28 Main function
5:32 Running the script
7:01 LSystem class
8:26 Alphabet property
8:50 Iterate method
10:49 Private methods
14:34 Converting output to music21 chords
16:41 Create and show music21 score
18:40 What next?