The MKS-70 came out in 1986 and your wright it is the rack version of the JX-10 . All the JX-10 is essentially 2 JX-8Ps in one box . It was noted to have slow enevelope speed and a rather wobbly sysEx system . You really should try to find the PG-800 programmer , it works with the JX-8P as well as the JX-10 . That will give you real time control over the parameters and you will be able to make your OWN interesting sounds .