The Roland JX-10 Super JX was a 12-voice analog synthesizer keyboard produced from 1986 to 1989, along with a rack-mounted version, the MKS-70. For nearly 30 years, it was the last true analog synthesizer made by Roland and has been critically acclaimed as one of their classic analog instruments. In 2015, Roland once again started producing analog synthesizers beginning with their JD-XA and JD-Xi keyboards as analog/digital crossover synthesizers. The design on the JX-10 is essentially two Roland JX-8P synthesizers put together, with a 76-note velocity-sensitive keyboard with aftertouch. It also includes features not found on the JX-8P, including a simple 1-track sketchbook sequencer and a delay effect (which works like a "MIDI delay" by delaying one tone rather than acting as a true DSP delay effect).