I absolutely love this, and really appreciate the time you spent putting this together!!
I am curious though if there are any plans to be able to choose which midi device is being used because I was trying to rig something up so I could send midi signal from FL Studio to my midi keyboard (Keystep) and have that output everything to SynthNes since I'm guessing a VST version of this is outside the scope of your plans.
This is also probably a problem specific to me, but my NES has a stereo output mod (Not sure who made it or when it was even installed since I got my NES from a coworker) but when I use that output, I only get audio for the pulse channels, and not the Triangle, Noise, or samples. Regular audio out works for all of the channels though!
Also, if anyone's recently changed their pin connector you might not need to remove the top because the one I have lets games run without being pressed down.
If you need help testing anything, I'd be glad to since I'm one of the few people seemingly who has both an EverDrive Pro, and synth stuff!