What do you do when no matter what your guitar sounds out of tune? So I am putting a few of my guitars through the paces today and they all sound fine until I get to one of my acoustics. My Korg & Boss tuners tells me that it is in tune, but my ear does not agree, I put new strings on it, retune, play hard, retune again, play a bit more, retune. Grab a capo and play, still sounds off. My tuner says that I am off by less than a cent each time, after tuniting to standard, my ear does not agree with my tuner. So I pick up a different guitar and play it and it sounds fine. Then I grab another guitar-same thing, sounds right. Back to my acoustic, retune-STILL NOT RIGHT??!!! Specifically it is a Parker P9E acoustic with new strings. I have had this guitar for 10 months and it has always played great for me. Never had any issues with it. It is still playing fine, no fret buzz, the neck is the same as ever. It just sounds off and I cannot pinpoint what is wrong. Is my ear getting better and I am noticing, or am I losing it? Has anyone else had this experience?