Roland say :
The RD-700 Expandable Keyboard is loaded with 64MB of stereo-sampled piano and instrument sounds—expandable via high-quality SRX-Series Wave Expansion Boards—plus an 88-note Progressive Hammer-Action Keyboard for the ultimate in musical expression. And with its new graphic LCD, intuitive knob- and slider-based editing and powerful arpeggiator, the RD-700 is everything an expandable keyboard should be.
- Flagship expandable keyboard with 128-voice/16-part multitimbral sound engine and 88-note Progressive Hammer-Action Keyboard
- Massive 64MB internal wave memory includes stereo-sampled piano sounds and a collection of Roland's best instrument sounds
- Large graphic LCD for easy operation; dedicated knobs and sliders for quick sound shaping and direct volume control over parts
- Expandable via two SRX-Series 64MB Wave Expansion Boards
- Extensive onboard effects processing
- One-touch Piano button instantly switches the RD-700 for piano performance
- Realistic tonewheel organ sounds with graphical drawbar editing
- Powerful arpeggiator with 45 styles including guitar strumming; 50 onboard rhythm patterns for practice and composing
- MIDI Tx button for easy control over external MIDI devices and sound modules.
E&oe. All the above info taken from the Roland web site:
Now Listen to the Sounds on You Tube