sentences:  The same technology was also packaged in a rack-mounted module released simultaneously, the TG77.The SY77 is equipped with a 61-key keyboard with velocity and aftertouch; has a pitch wheel and two modulation wheels (the latter being quite a rare feature among keyboards in general); and has a large backlit LCD display, expansion slots, floppy-drive, on-board effects, and a 16,000 note sequencer.Programming is performed through a keypad on the front panel.