I play guitar and I'm quite familiar with a C note, however I've never once tried to get my blade to sound like one. When I first started out scrolling I was always worried if my blade had enough tension, but I've learned over time what feels right and what don't. You get a nice high pitch ping when you pluck the blade and your doing good. Even with a tuning fork you'd end up driving yourself crazy trying to get a perfect pitch out of a saw blade. Just my advice, someone else might see it differently though.