Acoustic bass guitar of acoustic bass guitars. The bajo sexto, with six pairs of strings, resembles a twelve-string guitar tuned an octave lower. The heavy gauge strings generate a large string tension, yet the guitar is built relatively lightly. Musicians began to use the bajo sexto in Texas in the 1920s with the rise of "Tex-Mex" music, and remains in common use to play parts that would be played by the piano in traditional American popular music. It matches the standard tuning of a 12-string guitar, one octave lower. The tuning of these instruments is (capital letters are an octave lower than small
Bass guitar the strings, and extending the lower string scales allows the string to produce harmonics that are more in tune with the fundamental. To keep proper pitch across all frets in a multi-scale bass guitar, a fanned fret design is applied to the fingerboard. In this case, the frets extend from the neck of the instrument at an angle, in contrast to the standard perpendicular arrangement in standard neck designs, in which the fret spacing is wider for the long scale and closer for the short scale. This is not to be confused with perfect intonation across the whole neck, which