^^ It can be hard to tell a single note on its own. Some people can. I cant. Its about 10 cents off when I start to notice it. 1 cent would be some damn good ears.
Remember that post from last year of the isolated guitar tracks from Gimme Shelter? Clearly and, sometimes, painfully out of tune yet, the overall effect is something that perfect concert pitch could not have created.
Last weekend, I started a recording in my using Seymourised Epi Lucille. In my hurry to get the idea down, I did not bother to check the tuning. B was flat. The result is a rhythm guitar bed with a vibe similar to the last five minutes of Cant You Hear Me Knocking from Sticky Fingers.