I have an MPKmini midi controller hooked into A.M. and patched into a drum VST (SuperDrumFX). It plays fine, but there is a delay of about 1/3 to 1/2 a second between when the pad is hit and the sound happens.
I can go into the SuperDrumFX configuration and click on an instrument there with no delay.
My patch: MidiIn1 -> SuperDrumFX => SoundOut
I have tested an equivalent setup with another program (same controller, same VST) and it demonstrates no noticable lag. Am I missing something?