TWELVE-STRING GUITAR - guitar with six double strings. It is modern modification of Spanish LAUD and Latino American TIPLE. TWELVE-STRING GUITAR became wide spread in middle 70-th in Northern America and European countries. In Russia TWELVE-STRING GUITAR is widely used from modern bard singers to pop and rock music. TWELVE-STRING GUITAR is perfect solo and ensemble instrument, which has very bright, unique sound and rich harmonic color. This lets the musician to show high-level playing mastery.