Composed from theory · no model, no training corpus

Write music from
first principles.

Pick a style and it composes — harmony, bass, melody and drums, worked out from music theory rather than predicted by a model trained on other people's songs. Then edit every note, or build it a loop at a time from 1.2 million shapeable patterns.

• 129 styles, and the theory behind each one. Its tempo band, its scales, the progressions players in it actually reach for, its form and its groove — all readable in the source.
• The composer is rules, not a model. No neural network writes any of it and no recording was studied to build it, so nobody's music is in what you get. It is yours, commercially, with no royalty. (Audio-to-MIDI transcription is a separate tool and does use a small neural model — trained only on piano audio this project rendered itself.)
• Real instruments, public domain. Piano, drums and mallets are CC0 recordings — credited in full, and free to use.