Stereoplex is a 6HP voltage controlled stereo line switcher/stereo sequential switch. You can patch in audio or CV and the switch is bidirectional. So inputs can be outputs and the other way around. 

This can be thought of as an analog dp4t switch.

There is a touch surface on the panel to advance the clock. This button is very sensitive (intentionally) a very quick tap will advance the clock when no external clock is plugged in. if you hold your finger down and scrub the touch surface, you can scramble the switch's position, resulting in very glitchy movement. Very cool!