If they succeed, the computer will move a cursor up or down a screen placed in front of their eyes.

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The difference with the Tonara app is that it actively listens to musician playing and the cursor follows the performer, even when they speed up, slow down, stop or make a mistake.

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Users can, for example, write or edit a document on one device, put that device to sleep, open the same document on another device, and pick up where they left off, right down to the cursor position.

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To move the cursor, you swipe in the keyboard area left, right, up or down.

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