Check the listing for details. Nektar Impact GX49 MIDI Controller Keyboard. Color: Black, Condition: New. Listed at 109.99 USD. Nektar products are synonymous with DAW integration and the Impact GX49 is no exception. The compact design is comfortable in front of a computer and delivers powerful functionality not found on more comprehensive controllers. When inspiration strikes, the Impact GX49 delivers the control needed to capture ideas while they are fresh..The Keyboard The Impact GX61 is a dynamic and expressive instrument tailored to composition and performance with your computer music system. This 49-note (4-octave) keyboard features a pitch-bend wheel, modulation wheel and footswitch socket along with two multi-colored octave buttons that enable the keyboard range to be shifted up or down -3/+4 octaves with the LED colors changing to show the precise status.