Seven-string guitar string is augmented with a high octave string. Many of McGuinn's notable guitar solos utilize the G string of the twelve-string guitar to perform the main melody, and therefore the Martin seven-string guitar was designed to achieve this extended range playing without the need for doubling all six of the guitar's strings. In 2010, Inox Guitars has created a mix of the Brazilian Viola caipira and the Russian semistrunka (семиструнка). This instrument has 2 bass strings (as the 6th and 7th strings of the semistrunka) and five treble courses (as the Viola caipira) and it is used in open tuning
Chapman Stick carbon fiber. Today, they are made from laminated hardwoods (including padauk, Indian rosewood, tarara, maple, wenge and mahogany), and laminated bamboo, as well as graphite. In contrast to the guitar or bass, the Stick is set up with very little relief in the fretboard. It is very flat compared to a guitar, which has a slight bow. Combined with a long scale length, stainless steel pyramidal fret rails, very low string action, and very sensitive pickups, this setup is advantageous to the tapping style of play. The rear surface of the instrument is not curved like a guitar neck, but