This is a max4live patch and an DSI Evolver preset that are meant to work together and let you use polyphony on the evolver.
Up to four notes are independently associated with the Evolver oscillators and pitched correctly using various CC signals.
Very wide note speadings are not possible due to the control change range limit.
The same technique might work for other DSI synths.

Here is :
the Evolver patch
the M4L device

This sample is an example of polyphonic MIDI run through a single Evolver.