Wow...thanks for replying Len,
Ahhhhhhh.... I'm attempting to isolate a variety of pitches and tones from a pair of drums from India in live performance to trigger servos corresponding to a one of those specific pitches.
i.e. I hit the drum and it make an open toned pitch, or slap it....then the open pitch triggers a wheel moving and the slap closes a door. All live and synchronized.