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How does it work?

The program shows and plays the bar to strike; you strike it by tapping (or with the A S D F G H J K keys). The right bar, the order and, in rhythm steps, the timing are each checked. To strike two bars at once, use two fingers or two keys. In “No hints” mode the bar is not marked, and a hint appears after two mistakes. Your progress is saved in this browser on this device.