keyboard ma sound probably xa selling price only 4500 Yamaha YPR-30 portable digital piano, which is a vintage electronic keyboard from the early 1990s. [1, 2] Keyboard Details: It features 61 full-sized keys that are touch-responsive. Sounds & Features: The unit has 6 built-in voices, including Piano 1, Piano 2, Electric Piano, Harpsichord, Vibes, Strings, Jazz Organ, and Pipe Organ. Connectivity: It includes a sustain port, MIDI In/Out, and a headphone/output jack for external amplificatio