Posted on May 6, 2021May 7, 2021 by Dale Phillips Tuning the Guitar Tuning the Guitar by Ian Noyce Originally published Guild of American Luthiers Data Sheet #56, 1977 and Big Red Book of American Lutherie Volume One, 2000 Because the guitar has fixed frets set to an even temperament, tuning it properly is not the cut-and-dried process that many people believe. And due to various factors that we’ll get to shortly, if the guitar’s bridge is placed exactly where the nominal scale length says it should be, the instrument may not play in tune at all. The two most common methods of tuning are: (1) the 4th- and 5th-fret method and (2) the harmonic method. Both of these methods are often misunderstood through confusion regarding perfect (or Pythagorean) intervals and even-tempered intervals. The 4th- and 5th-fret method. Theoretically, this is the simplest method as it simply involves tuning unison intervals. The A string can be tuned to an A tuning fork, then the bass E is fretted at the 5th fret and tuned in unison with the open A. The D string is tuned in unison with the 5th fret of the A, the G string is tuned to the 5th fret of the D, the B string is tuned to the fourth fret of the G, and the high E is tuned to the 5th fret of the B. In practice this can be difficult because any errors are cumulative. It’s also true that many guitars tuned this way will not play in tune in all keys. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.