 Likewise, traditional hands-on controls were replaced with a DX-style interface with membrane buttons and one "edit" slider.The forerunners to the JX-8P were the JX-3P and the rack MKS-30.JX-8P was among the last true analog synthesizers produced by Roland in the 1980s, with Alpha Juno 1/2 synths, racks MKS-50 and MKS-70, and finally the JX-10.