mutant brain is a midi->cv converter - what you want is a cv->midi converter - there are not so many to choose from - befaco do a couple and addac - the doepfer one that I have has been discontinued and the current one is a single note and gate iirc
max/msp - are you using ableton? if so use I would have thought that using the cv tools in that and output to the es3 would be the simplest solution>
-- JimHowell1970
Right, I will look more into CV/Trig/Gate to Midi convertors.
And yes I am using Ableton. I will look into the ES3 as well, thanks for your suggestions!