The first electric piano model was the "Model 100 Rock-Si-Chord" in 1967. Retailing for $695, it contained two sounds (string and lute) but was later updated as the "Model 100A" which contained additional sounds (harpsichord, cembalo, lute, and two guitars). The "Model 200 Rock-Si-Chord" cost $995 and added an additional 4' voice, which required an additional set of tone generator boards for each key. Allen's Tom Emerick later said the Rock-Si-Chord was manufactured first because harpsichord voices were easier to design and manufacture than piano ones. The Rock-Si-Chord was discontinued in 1968.