Check the listing for details. Carbon 61 USB MIDI Controller. Condition: Open box. Listed at 169.89 USD. The Carbon 61 has a semi-weighted keyboard comparable to pro-level instruments. Its 61 velocity-sensitive keys allow you to accurately capture the full dynamics of a performance. In addition, the Carbon 61’s dedicated Transpose and Octave buttons, as well as its Pitch Bend and Modulation wheels, allow you to expand the keyboard and enhance your overall musical expression. Take control of your music software with the Carbon 61’s assignable data encoder and volume slider. For easy editing, players can use the Shift key to adjust up to 14 performance-related control parameters. Also, the Carbon 61’s 3-digit, 7-segement LED displays the behavior of every function in real-time. Designed with the iPad in mind, the Carbon 61 features an integrated iPad slot and can be used with your favorite MIDI.