Hi guys, I'm not sure where this question should go, but I think it fits best here. As of a few weeks ago, I've noticed that I am having problems distinguishing the tone of notes lower than A-110HZ from my E string and below. Sometimes I can clearly hear the tone, but occasionally it sounds a few cents sharper to me than it really is (since I test it against the higher octave). Has anyone experienced this? Is this some sort of ear fatigue (this happens even during short practice sessions)? And no, my strings are fine since this has happened on both round and flat wound strings--only a few months old, each. Am I just going tone deaf at 34?!