The MS6 was built by a British company called Cheetah, who started out making low-cost home computer accessories, and moved on to making musical products. Most well known are perhaps the master keyboards. Also well known unfortunately the low production quality, which also affected the MS6. It only tacks up a 1U space in a rack, yet it's fully multitmbral and programmable. It has room for improvement.
Envelopes utilize linear ramps instead of exponential curves.
ROM patch locations. Oscillators cannot be turned off completely, so self-oscillation of the filter can not be readily exploited. It has no volume control. Being interested in analog synthesizers, but still a programmer at heart I decided to do a slight rewrite of the operating system. It also is quite easy to modify.