Waaaaaay back in the steam power days of x2 when prochannel add remove modules was in it's beta infancy I accidentally dragged a standard open vst to the PC. It landed there, did it's best to squeeze it's gui into the small space of a pc module so it wasn't tweakable but the "shocking" thing was:
It passed effected audio.

All vst's I tried this with worked the same.
I let the powers that be know and it's was fixed but that happened.