Its quicker if you don't need a tuner. The key (forgive the pun,) is to listen for the tell-tale signs of a slight discord. Most people can get within 2hz on

Its quicker if you don't need a tuner. The key (forgive the pun,) is to listen for the tell-tale signs of a slight discord. Most people can get within 2hz on the same note. With practice you can use one note to tune another. For example when I worked in a sound studio, I could tune a guitar using a single reference note(e, a, d, g or b) (without harmonics or similar) More skilled people could use other notes.