
via this auction
Note this is a CS-50, not CS-60. The 60 has a ribbon controller. Both are essentially half a CS-80. A CS-80 allows you to layer two voices and of course has poly aftertouch.
EVERYTHING SYNTH

"Backline MIDI is a utility designed for fast, accurate MIDI troubleshooting in any setting. Created by the minds at Audiofile Engineering, it's an ideal tool for traveling techs and live engineers who need a convenient way to monitor or send MIDI information on the go. Create a master clock for tempo and time-sync functions, monitor incoming MIDI messages across channels with detailed info, and much more, all with an intuitive, easy-to-read interface.