Yeah, if you play an A chord on the guitar and it sounds "off", then one or multiple strings are out of tune (sharp or flat relative to each other). The same is

Yeah, if you play an A chord on the guitar and it sounds "off", then one or multiple strings are out of tune (sharp or flat relative to each other). The same is true if you have 2 guitars playing together and one guitar is out of tune to the other (or any number of instruments). Beato seems to think that people should just "feel" or know that, but I think he might be blind to how little people play instruments or how little the average person has "trained" to pick up when something is out of tune. People that play instruments can usually pick it out pretty quickly, especially in a band setting. People that pick up a guitar can't just immediately tune it. Over time, however, you get a very intuitive sense for what "in tune" means (which is really just like a set amount of harmonic 'steps' between the strings) and can tune by ear very quickly - whether that in tune guitar has actually been tuned to E standard, however, is more about a common reference point for that note. Beato seems to be thinking that common reference point is a kind of general knowledge, but it's definitely not.