The baritone guitar is a guitar with a longer scale length, typically a larger body, and heavier internal bracing, so it can be tuned to a lower pitch. Gretsch, Fender, Gibson, Ibanez, ESP Guitars, PRS Guitars, Music Man, Danelectro, Schecter, Jerry Jones Guitars, Burns London and many other companies have produced electric baritone guitars since the 1960s, although always in small numbers due to low popularity. Tacoma, Santa Cruz, Taylor, Martin, Alvarez Guitars and others have made acoustic baritone guitars. Use The baritone-tuned guitar was uncommon until the Danelectro Company introduced an electric baritone guitar in the late 1950s. The electric baritone found some popularity in surf music and film scores, particularly "spaghetti Westerns." "Tic-tac bass" is a method of playing, in which a muted baritone guitar doubles the part played by the bass guitar or double bass. The method is commonly used in country music. Tuning and string gauges A standard guitar's standard tuning (from lowest–pitched string to highest) is E2–A2–D3–G3–B3–E4. While no standard tuning has been established for baritone guitars, popular tunings for the instrument are: a perfect fourth lower than a standard guitar (B1–E2–A2–D3–F3–B3), a perfect fifth lower (A1–D2–G2–C3–E3–A3), or a major third lower (C2–F2–B2–E3–G3–C4). Typically strung with 13 gauge (.013–.062), or 14 gauge (.014–.068) baritone guitar strings. 12 gauge (.012–.060) guitar strings can also be used. Baritone acoustic guitars typically have larger bodies than standard guitars, and have longer scale lengths so the strings can be tuned lower while remaining at normal tension. On a standard guitar, the scale length (the distance from the nut to the saddle on the bridge) is typically . The most common scale lengths on a baritone range from . Baritone guitarists 1960s early adopters In the 1960s, it was often tuned an octave down from standard guitar tuning; therefore, these recordings used a retuned baritone guitar as a six-string bass. The Danelectro baritone was used by guitarist Duane Eddy in numerous recordings, including "Bonnie Came Back", "Because They're Young", "Kommotion", "My Blue Heaven", "Deep in the Heart of Texas", and "The Son of Rebel Rouser". The instrument was used almost exclusively on his best-selling 1960 album "The Twang's the Thang" and appears regularly on singles and albums throughout his career. The "twangy" sound of his guitars (which include Duane Eddy custom-builts by Guild, Gretsch and Gibson) augmented the even deeper twangy sound made by the Danelectro baritone. Eddy used the