MIDI & Song Conversion

MIDI is the most precise way to make the balls play a specific song. Import a MIDI file and the engine maps its note sequence onto ball collisions, so each bounce plays the next note in perfect order. Because MIDI carries the exact notes and timing, the result follows the original melody faithfully no matter how the physics unfold.

A full MIDI file can contain more notes than you want a single ball to play. The MIDI tools let you filter the note range and sequence which notes fire, and the on-screen histogram shows the note distribution so you can see what you are working with. Trim a busy file down to the melody line for the cleanest result.

The song converter helps you turn a standard audio track into a synced run. It analyzes the audio so you can build a Rhythmic run around a song rather than starting from a MIDI file, and a Track Compositor lets you stitch sections from several sources into one active track. A converted track is always less precise than a MIDI file, because the source has no note data, so budget time to listen through the result and raise Min Bounce Spacing if the note queue comes out too dense. Pair it with the note filtering above to refine the result.

You own the runs you create, and paid plans include a commercial license for what you export. But that license covers your simulation, it does not grant rights to someone else's copyrighted song. If you build a run around a melody you do not own, make sure you have the rights to use that music on the platform you are posting to. Original melodies, public-domain pieces, and licensed tracks keep you safe.