The Elka was one of the first string synthesizers and was used extensively by the likes of Vangelis, Jean-Michel Jarre, Tangerine Dream and other European synth masters. Technically, string synthesizers are electric organs coupled with a nice chorus unit to fatten the sound. An optical expression pedal was used on the Rhapsody to swell the sound in and out. There are two sliders for volume and sustain (release), and two buttons for cello and strings. Original price: $795. 50 Megabytes.