Abstract: A system, comprising one or more processors; and memory storing instructions executable by the one or more processors to causes the system to associate together streams of data from at least three devices separated by a network, the at least three devices comprising a first device of a first user, a second device of the first user, and a third device of a second user, wherein association of the streams of data together enables the first device to receive data from the third device and the third device to receive data from the first device and the second device, wherein the data from the first device and the second device indicate playing of a first musical instrument by the first user and the data from the third device indicates playing of a second musical instrument by the second user, update a first user interface of the first device according to an event that occurred on the third device, and update a second user interface of the third device according to an event that occurred on the third device.

Abstract: A piano training device is described herein. The piano training device comprising a plurality of keys which may be illuminated by a light source associated with each key. The light source associated with each key is oriented such that the light source transmits light toward the front surface of the key. The key is further manufactured so that the light transmitted toward the front surface of the key is redirected to the top surface of the key.

Abstract: A piano training device is described herein. The piano training device comprising a plurality of keys which may be illuminated by a light source associated with each key. The light source associated with each key is oriented such that the light source transmits light toward the front surface of the key. The key is further manufactured so that the light transmitted toward the front surface of the key is redirected to the top surface of the key.

Abstract: A piano training device is described herein. The piano training device comprising a plurality of keys which may be illuminated by a light source associated with each key. The light source associated with each key is oriented such that the light source transmits light toward the front surface of the key. The key is further manufactured so that the light transmitted toward the front surface of the key is redirected to the top surface of the key.

Abstract: A piano training device is described herein. The piano training device comprising a plurality of keys which may be illuminated by a light source associated with each key. The light source associated with each key is oriented such that the light source transmits light toward the front surface of the key. The key is further manufactured so that the light transmitted toward the front surface of the key is redirected to the top surface of the key.