music21

music21 is a toolkit for computer-aided musicology and music analysis in Python.

Overtone

After a long hiatus, I want to revive Metasolfeggio. This time, I'll do my explorations in Overtone, a live-coding platform based on SuperCollider and Clojure.

Music Theory in Python

I stumbled upon mingus, a music theory and notation package for Python with MIDI playback support.

I'll give it a try. It looks neat and well-thought, yet the project is enough in its infancy that I might get a chance to contribute.  We'll see.