Concert grand piano dummy (1), which has the body (11, 11 ', 12) of a grand piano without mechanically sounding components, wherein the body (11, 11', 12) - at least partially dismantled and consists of several components and instead of a Keyboard has at least one slot (13) for receiving a synthesizer (2), and a body (11) which is mounted on at least three feet (12), characterized in that the body (11) is completely translucent and in that the body (11) a plurality of LEDs as light sources (14) is arranged, wherein the LEDs (14) are coupled to a ballast, which is adapted to set a predetermined light color and / or brightness of the LEDs (14), and the concert grand piano Dummy (1) has a power supply terminal (16).
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