Making a Pocket Bass drum and need help!!!!

first of excuse ignorance, i'm musician 
but beginners perspective how go making trigger arduino sensitive pressure applied when hitting trigger pad???
coding sample (in case bass drum) played when step on pad , volume dependant on how hard hit it, how do that?

https://www.sparkfun.com/tutorials/330

do want midi trigger?
http://todbot.com/blog/2006/10/29/spooky-arduino-projects-4-and-musical-arduino/

Arduino Forum > Using Arduino > Audio > Making a Pocket Bass drum and need help!!!!

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