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From: v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton)
Newsgroups: rec.music.makers,rec.music.synth,sci.electronics
Subject: MIDI Drum Pad Hack Interface (Messing about with a cheap keyboard)
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Date: 6 Feb 91 18:28:28 GMT
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	I'll be honest.  I'm sick of playing drum parts on those little tiny
pad they put on drum machines.  But I can't afford a Roland Octopad II (I'm
still trying to buy a new drum machine!).  So I thought of something.
	I have been told that velocity sensitive keyboards actually measure
the velocity by measuring the time it takes for two contacts to be made for
one key (each key has two contacts - measure the time between their closings
and you can determine how *fast* it was hit, hence velocity)  
	Now what I want to do is interface homemade drum pads to a cheap
velocity sensitive keyboard.  What I plan to do is use piezo elements (from
radio shack buzzers of course!) to supply a voltage to a circuit.  The circuit
will use the voltage received as a delay time between two triggers attached
to the keyboard.  Seems simple enough.

	Now I need:
		Info on if this is indeed how Velocity sensitive boards
			do work...
		Recommendations on cheap velocity sensitive boards...
		Recommendations on how to build the drum pads.


			Thanks alot.

			Ken Morton