Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Roland AX-Synth is a keytar that is manufactured by Roland Corporation, and was released in late August 2009. This modernized instrument builds on the features of its predecessor, the Roland AX-7. The most notable change is the addition of an internal synthesizer. A UV Black-colored "premium" model called "Black Sparkle" was released in September 2010.The AX-Synth extends the keyboard to 49 keys (from the AX-7's 45) and also adds dedicated V-Link functionality to control audio and video onstage. It runs on 8 AA batteries or an external power source. It has 264 built in tones, 128-voice polyphony, and a 3-character LED display. The AX-Synth also has all of the AX-7's stage performance functions such as the touchpad-like pitch bend ribbon, expression bar, sustain switch, and volume control knob, all on the upper neck of the instrument. As with the AX-7, there is also a proprietary "D-Beam" interface, made up of infrared sensors that detect nearby motion.