Octave twelve the ""Mando-guitar"" from 1964 to 1968. Notable users of the Mando-guitar include Brian Jones of The Rolling Stones. Most modern octave twelves are modeled after the distinctive body shape of the Vox Mando-guitar. (Some believe that George Harrison of The Beatles used it on the song "Words of Love" in 1964, but the Mando-Guitar was not introduced until the following year.) It was (and may still be, in live performances) also used on the introduction of The Beach Boys' "Wouldn't It Be Nice", from "Pet Sounds". Octave twelve An octave twelve is a type of 12-string guitar fitted with a
Rule of the octave Rule of the octave The rule of the octave is a way of harmonizing each note of the diatonic scale, reflecting common practice, and has its origin in the practice of thorough bass, or basso continuo. The rule of the octave also formed the cornerstone of the "regole" (rules) of partimento collections. The rule of the octave was first mentioned in the 17th century in treatises for thorough bass written for lute-like instruments. There is normally a different harmonization for ascending and descending bass lines, and, although called a rule, there are several variants with different chords. Different versions for