sample trigger (release trigger) without note off

Dore Mark

I'm trying to script piano action release noises. These noises occur every time the key is released. The problem is that the action release noise happens also when the sustain pedal is depressed.  

e.g. finger down, pedal down, finger up, pedal up would result in an action sound before pedal up, yet the original sustain sample still goes until pedal up.

Now I realize I can disable the default release trigger and pedal scripts and build my own. But I think the fundamental problem is that I need to know independently when the finger is released from the the key, (which technically is a midi note off message), yet not have the sustain sample cut off because the damper pedal is down. Basically, there is no callback for this situation (?)