I've an electronic drum machine - which involves electronic drum pads with piezoelectric transducers in them (which pick up you hitting the pads with your drum sticks) which feed into a magic drum machine brain that senses when your cranking out some beats!
I want to feed two of these pads into a single input, which I have tried by simply linking the cables that come out of the transducers in parallel. The sensitivity of the drum pads seems to plummet and they don't work half the time if this is done.
I was wondering it there's something about piezo transducers I need to do to stop them interfering with each other's output. I wondered if one was acting as a resistor to the signal produced by the other (almost acting as a speaker) and damping things down, or are they acting as capacitors to each other? Do I need to stick a diode between each of them or something! I'm not sure and the info I've read hasn't helped much.
Hoping you have some advice, thanks :)