From what I read on the internet where everything is true, you can just hook up a knock sensor to the high line of a microphone input, ground the low line, and plug it into a headphone amp and it just works. Is this true before I break out my soldering iron? If I have an on board PC, can I simply connect the 'line in' to the knock sensor and then monitor that audio input for tell-tale audio signature of preignition while I crank up the timing? And, er, what might the tell-tale audio signature of preignition look like if you were looking at audio in wave form (or would it be better to just stick in my earbuds and listen?). Was hoping I could identify knock by looking at a wave form since there is so much misc. racket in the car that using headphones alone I suspect I might misidentify a noise as preignition. And I don't want to drop the money on fancy pants headphones.
