The standard use of Cthulhu is to just connect it to a synth like this: I’ll start by showing you the basic set-up and then the one where you can get at those individual notes. I find that often it is desirable for me to get the actual notes Cthulhu creates out to the piano roll in FL Studio so they can be edited individually and outside of Cthulhu.
Lots of patterns when used with the correct synths, can sound a lot like deadmou5 and this makes sense as Joel Zimmerman has been known to use Cthulhu made by his associate, Steve Duda. Xfer Records Cthulhu program creates arpeggios and chords like none other.