music21
6.7#6 in music theory softwareFree planFree planWebLinuxmacOSWindows
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music21 suits musicologists, programmers, composers, performers, and music enthusiasts who can work with Python. It is useful for symbolic-score analysis, notation workflows, music education, and computational composition across desktop or web environments.
note-noodle suits learners who want structured music theory practice and interactive exercises across notation, rhythm, ear training, and instruments. It also fits users who want to practice with MIDI, a microphone, or a desktop DAW connection.