The Rhodes MK80 is a a weighted-action 88-key digital piano, manufactured by Roland from 1989 after they bought the rights to the “Rhodes” brand from CBS. The Rhodes MK80 features several Rhodes patches, along with acoustic piano, vibraphone & clavichord simulations, and effects including chorus and phase shifting. The engine behind the MK-80 was Roland’s S/A synthesis model, used in the RD-series pianos at the time. Harold and Major Key’s John R. McLaren had constructed a single-key model of the Rhodes, an adjustable-pitch mechanism that could reproduce any note across the entire range of the piano, which Roland sampled and analyzed in developing the S/A patches.