drum trigger to arduino

hi does anyone have any experience using drum triggers with their arduino? I'm thinking of something like a roland rt 10 or a ddrum. I'm assuming both of these have a voltage output but i can't seem to find tech specs for either, since they want you to buy a drum module too.



look for the Todbot articles on this. Attaching a piezoelectric 'buzzer' and a resistor to an Arduino input gives you the drum trigger.