Importance

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Abstract

An automatic player piano prolongs acoustic sounds in playback as if a player pushes down a sostenuto pedal, and a controller is responsive to a first piece of music data information representative of key-on state, a second piece of music data information representative of key-off state, a third piece of music data information representative of pedal-on state and a fourth piece of music data information representative of pedal-off state so as to play a tune by using key actuators associated with the keys; when the first piece of music data information is supplied to the controller for a key, the controller instructs the key actuators to change associated the key from the key-off state to the key-on state; when the second piece of music data information is supplied to the controller without the third piece of music data information for a key, the controller instructs the key actuator to change the key from the key-on state to the key-off state; when the second piece of music data information is supplied to the controller in the presence of the third piece of music data information for a key, the controller instructs the key actuator to maintain the key in the key-on state; when the fourth piece of music data information is supplied to the controller after receipt of the second piece of music data information, the controller instructs the key actuator to change the key from the key-on state to the key-off state.

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First Claim