The two projects are in completely different playgrounds. The midimutant is device that controls synths via midi, while nsynth is a synth (surprise!). And yes,

The two projects are in completely different playgrounds. The midimutant is device that controls synths via midi, while nsynth is a synth (surprise!). And yes, it would be fun to use them with each other, though it would certainly take a bit of work on both sides (and is currently impossible because the midimutant source hasn't been released).