"The Roland Super JX (JX-10) appeared in 1986 and was manufactured until 1989 with no additional factory mods (to my knowledge). It is a 12-voice digital/analog hybrid synthesizer with 24 DCO's (digital controlled oscillators) and a 76-key velocity and pressure sensitive keyboard. Each voice consists of two DCO's, a VCF, VCA, and two ADSR envelope generators. There are 100 editable internal Tones, 50 ROM and 50 RAM, and 64 on-board patches. Memory can be expanded by the use of M-16 or M-64 cartridges for an additional 32 or 64 patches respectively. There is an internal scratch sequncer and song data is stored in the memory cartridges (M-16 approx. 400 notes and the M-64 approx. 1600 notes). It has a single bender/modulation lever and a 32-character blue fluorescent display.