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
That's What That's What That's What is one of the more idiosyncratic releases by solo steel-string guitar artist Leo Kottke. It is distinctive in its jazzy nature and "talking" songs ("Buzzby" and "Husbandry"). It reached #24 on Billboard's Top New Age Albums charts, Kottke's highest charting position on Billboard. The song "Little Snoozer" is played on a Charvel demo model of a Danelectro 6-string bass guitar tuned one octave lower than a standard 6-string guitar. Kottke has re-recorded at least two more versions of "Jesus Maria". The Allmusic of the album stated "Leo Kottke has always been a highly idiosyncratic guitar player