The Proph@t Plus was my customised version of the Prophet synthesizer. It featured a number of additional functions compared to the original hardware unit, include Highpass and Bandpass filters, effects, Wav Oscillators for sample playback, and a number of performance functions for use with Aftertouch and Velocity. 

Some talk on Planet Z raised my interest in developing more sophisticated modules for use in the Scope Modular system. I took the Proph@t Plus and modified it to work as a module within a standard Scope Modular II or III. This greatly expanded upon the older Prophet style structure by adding a patchable connect bay for direct access to a wide variety of functions.