I am using the Knock example from the Arduino software. I am a beginner with all of this, I didn't even know what "G", "+" or "S" meant on this shield I'm using (ground, power?, signal) - turns out I was plugging things in the wrong places. So, it does as it should, outputs "knock" in the serial monitor and the led flashes but sometimes the knocking starts and just keeps going. Now, in the tutorial it says I should wire a 1-megohm resistor in parallel to the Piezo element, is this necessary? Is this why my thing starts knocking endlessly after awhile? How the hell do I wire a resistor in parallel with this setup? Thanks in advance for being patient and helping someone get off the ground.