I'm starting a simple home studio and would like to buy a sound meter, primarily to keep volumes in my studio below damaging levels, but also for consistency when mixing. I've read up on the differences of A vs C weighting, but still am not sure which I should be using for which situation. One source recommended C weight for levels above 85db, A weight for below. Maybe that works for playing guitar, but what about mixing? Can anyone clarify? I just want to save my ears when playing guitar, and mix at a consistent level. Thanks!