The instrument
The Yamaha CE 20 and CE 25 preset synthesizers with FM synthesis appeared before the DX series and were replaced by it. Called Combo Ensemble, they offered FM preset sounds, a filter effect, vibrato, ensemble effect and aftertouch. The CE 20 has a keyboard with 49 keys and is partly eight-voice polyphonic, partly monophonic with a portamento.
Details
The CE 20 is not programmable, but offers limited editing of the presets. The vibrato has controls for speed, depth and delay. Tone Initial and Tone After adjust the velocity and aftertouch sensitivity and Slide controls the portamento time for the monophonic voices. Monophonic presets: piccolo, flute, oboe, clarinet, saxophone, trumpet 1, trumpet 2, trombone, violin, cello, contrabass 1, contrabass 2, electric bass 1, electric bass 2. Polyphonic presets: brass, horn, organ, electric piano, harpsichord, strings.