Among Yamaha's DX line of synthesizers, the DX1 is definitely the biggest and most expensive. With a dual 6-operator digital FM engine, it's like two 's wrapped up in a wood-paneled case and comes with a truly professional weighted 73 note keyboard sensitive to both velocity and aftertouch. The  style membrane buttons have been replaced by actual push-buttons, display screens and the overall layout of buttons and diagrams is nicer and better organized.

Sound-wise, the DX1 is like a fatter . It too features FM synthesis. That means that although the DX1 is a digital synthesizer, its sounds are unique and fresh with an analog/digital hybrid feel. Programming however, is not at all like analog synth programming. All DX series synths use FM synthesis and all are rather difficult to program or, at least, difficult to understand what to program. Fortunately the advanced DX1 has display screens that show amplitude modulation, envelopes, velocity, levels and de-tuning parameters unlike previous DX synths so you can better visualize what and how you are editing parameters. A neat new feature for the DX1 is that two patches (Channel A and B) can be used simultaneously with the keyboard in layer or split-mode. This mode is generally 16-voice polyphonic, but with just one patch loaded you can have 32 voices of thick polyphony! Pretty good for a synth over 15 years old