I've had a project where I had two pins connected to the piezo. If I left one at ground or vcc and cycled the other, I could make a frequency. If I cycle them both out of phase to each other, I can get the same frequency with more volume. Here is my question - does it matter what the resting state is of these 2 pins? It is the transitions that consume current, correct? If one pin is low and one is high, it doesn't seem to be using any current. Is that better or worse or the same than two pins low?