The 1980s was a very interesting decade in the history of synthesizers as major synth manufacturers moved from analog subtractive synthesis to a digital FM synthesis method. One of the pioneers in this aspect is Yamaha, who came up with the DX7 in 1983. In an effort to conquer the digital FM synth market, Casio developed the CZ series of synthesizers that included the CZ-1000 and its baby brother, the Casio CZ-101. Despite not being a keytar in design, the CZ-101 can function as one by just attaching a guitar strap to its two strap buttons.