Classical guitar
Kevin Kastning (born December 26, 1961 in Wichita, Kansas) is an American guitarist, composer and musical instrument inventor. He plays the 36-string Double Contraguitar, 30-string Contra-Alto guitar, 17-string Hybrid Extended Classical guitar, 15-string Extended Classical guitar, twelve-string guitar, six-string guitar, fretless guitar, 12-string extended baritone guitar, 6-string bass-baritone guitar, alto guitar, the 14-string contraguitar, the 16-string contraguitar, the 17-string contraguitar, 12-string soprano guitar, mandolin, piano, and bass.