RD-300GX: Digital Stage PianoRD-300GX: Digital Stage Piano A Powerful Piano for Stage Performance Features Step on stage and step up to the world’s most impressive stage pianos, with amazing pianos and EPs onboard, plus audio-play and master control features. The RD-700GX and RD-300GX are powered by Roland’s latest sound engine for incredible sound quality. Stunning 88-key stereo multi-sampled piano sounds 88-key weighted keyboards: PHA alpha II Audio playback of .WAV, AIFF, and MP3 files via USB memory; easy on stage control with Audio Key feature Multiple zones for master-control functionality var addthis_config = {"data_track_addressbar":true};