In major-thirds (M3) tuning, the chromatic scale is arranged on three consecutive strings in four consecutive frets. This four-fret arrangement facilitates the left-hand technique for classical (Spanish) guitar: For each hand position of four frets, the hand is stationary and the fingers move, each finger being responsible for exactly one fret. Consequently, three hand-positions (covering frets 1–4, 5–8, and 9–12) partition the fingerboard of classical guitar, which has exactly 12 frets.[note 1]
Flatwound strings have a flat surface. These strings are very popular among jazz guitarists because they have a very dark and understated tone. However, they are also more difficult to play. These strings are not a good fit for rock or blues, because they’re stiffness and dark tone means that it’s hard to cut through the mix and pull off the fast and intricate runs and bends that define blues, rock, and metal.
As stated above, construction has just as much of an impact on a guitar’s tone as material. The factors that make up construction are as follows: gauge, string core, winding type, and string coating. And while these factors are all important, keep in mind that different companies use different approaches to all of them. So never be afraid to try out a variety brands, because while the strings may look the same you will get a different response.
Only two or three frets are needed for the guitar chords—major, minor, and dominant sevenths—which are emphasized in introductions to guitar-playing and to the fundamentals of music. Each major and minor chord can be played on exactly two successive frets on exactly three successive strings, and therefore each needs only two fingers. Other chords—seconds, fourths, sevenths, and ninths—are played on only three successive frets.