Editing Seven-string guitar (section)

== Hybrid designs ==
In the early 2000s, [[Roger McGuinn]] (renowned for his skills on the [[twelve-string guitar]] and for his long association with [[The Byrds]]) worked with [[C. F. Martin & Company]] to develop a seven-string [[folk guitar]]. McGuinn's guitar (currently being marketed by Martin) is tuned the same as a standard folk guitar with steel strings, but the third (G) 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, [https://web.archive.org/web/20160906091808/http://www.inoxguitars.com/ Inox Guitars] has created a mix of the Brazilian [[Viola caipira]] and the Russian [[Russian guitar|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 (GDGDGBD) as a [http://soundcloud.com/inox-guitars slide guitar].