The Roland RD-300GX is a powerful digital piano for powerful stage performances. It includes an impressive collection of stereo multi-sampled pianos, electric pianos, organs, and performance synth sounds. You also get PHA alpha II 88-key weighted action, WAV, AIFF, and MP3 audio playback, and multizone master controller features. The RD-300GX's vast sound set is powered by Roland's latest sound engine for incredible sound quality. Perfect Piano The RD-300GX features two sets of 88-key pianos sounds from the popular RD-700SX. In addition to its super-expressive onboard piano sound-sets, other essential instruments are built into this new piano, including EPs. You can even customize and save your sounds for instant recall. Perfect Touch Your fingers will love the RD-300GX's PHA II alpha II weighted keyboard. USB Audio Enhancement Play audio through the RD-GX directly from a USB memory key. Flexible file compatibility enables playback of Standard MIDI Files, .WAV, AIFF, and MP3s. The "Audio Key" feature lets you use the bottom 15 keys for controlling start song, song length, etc. In addition, you can connect directly to a PC via USB and tap into Cakewalk's SONAR LE software, included in every RD-GX package. Custom Shop For those who like to get inside an instrument and customize its sounds, the RD-GX's Piano Designer feature is your key to unlocking and personalizing the sound-set, down to the smallest details such as Hammer Noise, Damper Resonance, Duplex Scale, and more. Master Control The RD-GX series make great master controllers, thanks to multizone functionality.