Blossom · hand tracking

Rest is set automatically the first time both hands are detected. Each hand is measured from its own starting position.

If anything is wrong, press this and paste the result into your reply. It copies everything above, and a lot more besides, so nobody has to ask you questions about it.

The sound can be turned on before the camera, and keeps working even if the camera does not. Test sound plays one note on its own: if you hear it, the sound is fine and the problem is the movement. If you do not, the problem is here.

In hand widths, from each hand's own rest point. Equal numbers mean both hands are doing the same amount of the work.

Even contribution picks the nearer chord tone, one hand carrying the work picks the further one. The answering note is placed by the engine's own displacement, not by this page.

Whether tracking holds when the hands are close together is a question about your camera and your setup, so the page measures it: every frame is binned by the last known separation and counted. A high "lost" share in the closest bin is the failure mode to watch for.