The EL-90 was the first Electone to feature a built-in MDR, setting the trend for years to come.
This instrument refined FM synthesis voices from the HX/HS line, combining them with AWM waveform synthesis and more advanced expression and filtering techniques. The result was voices that sounded dramatically like that of the instruments they were meant to emulate. Cellos sounded like cellos, trumpets sounded like trumpets! Truly orchestrated Electone was born.