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How does it work?

First choose the valves (tap them and they stay down), then hold an air button: slow air gives a low sound, fast air a high sound, and the valves make the sound lower. On a computer keyboard, J, K and L are the valves and A, S and D are the air buttons. The note you play and its timing are checked automatically. In “No hints” mode the valve marks are hidden, and a hint appears after two mistakes. Your progress is saved in this browser on this device.