LenMus is free open source software for learning music theory.
It allows the musical student to focus on specific skills and exercises, on both theory and aural training.
The different activities can be customized to meet your needs, and it provides interactive feedback until mastery of each concept is achieved. It also includes an score editor.
Key Features
- Books and lessons on music theory.
- Aural training to recognise intervals, chords, scales and tonality.
- Practice music theory concepts including:
- Identifying and building key signatures.
- Building and spelling intervals.
- Identifying scales.
- Identifying chords.
- Identifying cadences.
- Music reading: scores composed by the program. Never repeated.
- Clefs reading.
- Score editor (in an early stage of development):
- Create simple scores with several instruments and voices.
- Many voices per staff.
- Internationalization.
- Support for interactive books on music.
- Useful in a classroom to do exercises in teams.
Website: sourceforge.net/projects/lenmus
Support: SourceForge
Developer: Carlos De La Fuente, Cecilio Salmeran
License: GNU GPL v3

LenMus is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Educational Music Software | |
|---|---|
| Nootka | Learn classical score notation |
| Piano Trainer | Learn piano scales and chords |
| LenMus | Music education software to learn music theory and language |
| Music Blocks | Programming environment for children interested in music and graphics |
| Impro-Visor | Jazz improvisation advisor for the improviser |
| Piano Booster | Boost your piano playing skills |
| Solfege | Highly proficient ear training software |
| Minuet | Grow your music knowledge |
| OpenEar | Ear training app for musicians |
| Tete | Ear training software |
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