Back before electronic tuners were everywhere you looked, usually one guy (who always thought he was right) would sneak off into a dark corner and tune up using a tuning fork, then come back, plug in, and loudly proclaim, "tune to me." The fact that his mother who had acquired a taste for metal when she was carrying him and delivered the tuner along with him at birth had some influence on tuning. If you listen to old recordings, especially old blue grass recordings, you'll wonder just what the hell they were tuned to. Earl Scruggs commonly tuned to "about" G sharp for years. Some say it was to accommodate Lest Flatt's voice, it was probably just how he heard how he was supposed to tune. Many old recordings are impossible to play with if you are tuned to an electronic tuner of any kind. You just have to "tune to them." I keep an acoustic guitar tuned down a half step sitting on a stand just so that I can play along with some of the folks who thought that was how you were supposed to tune a guitar, and there are quite a few. BE GLAD, VERY GLAD THAT THERE IS AT LEAST SOME SEMBLANCE OF TUNING TODAY!