A guitar (classical, acoustic or electric) with seven strings instead of six. The classical guitar typically has 3 nylon and 3 nickel-wound strings. ...

The Russian Guitar

The classical and acoustic seven string guitars originated in 19th century Russia. Its invention is attributed to Andreas Sichra who also wrote the method for the guitar and seventy-five compositions. It has been then proclaimed to be a Russian guitar and has been primarily played in Russia and later the Soviet Union. While it did not replace the regular six string guitar in Russia, many of the more "patriotic" musicians such as Simeon Aksenov and Yuri Vizbor chose to play it as it is a part of Russian herritage. The Russian version of the seven string guitar has been used by professionals due to its great flexibility, but has also been popular with amateurs due to the relative simplicity of some basic chords. In the standard tuning, the A major chord is simply a barre on the second fret, the B major is a barre on the fourth, C major on the fifth, D major on the seventh etc. Alternative meaning: Nineteenth Century (periodical) (18th century — 19th century — 20th century — more centuries) As a means of recording the passage of time, the 19th century was that century which lasted from 1801-1900 in the sense of the Gregorian calendar. ... Yuri Vizbor Yuri Vizbor (Юрий Визбор) (June 20, 1934–September 17, 1984) was a well-known Russian bard and poet as well as a theatre and film actor. ...

The Electric Guitar

The electric version of the seven string guitar was introduced in the late 1930s by George Van Eps. The guitar was basically a regular electric guitar with an additional bass (usually Low-A) string. This feature allows playing bass, chords and solos simultaneously. Van Eps referred to this style of playing as "lap piano". While still considered a rare novelty, seven string electric guitars are occasionally used by popular metal bands (such as Korn) and virtuoso guitarists (such as Steve Vai and John Petrucci). The eight-string also has an underground virtuoso following. Bass (IPA: [], rhyming with face), when used as an adjective, describes tones of low frequency. ... KoЯn KoЯn is a nu metal band from Bakersfield, California, United States. ... Steve Vai at G3 in Milan, Italy, June 2004 Steven Siro Steve Vai (born June 6, 1960 in Carle Place, New York, USA), is an American guitarist and composer. ... John Petrucci (born July 12, 1967) is the guitarist and a founding member of the progressive metal group Dream Theater. ... An eight string guitar is, as the name implies, a guitar with eight strings. ...

Jazz guitarists using the seven-string instrument include Bucky Pizzarelli, Howard Alden, Ron Eschete, Lenny Breau, and John Pizzarelli, who is the author of the Foxwoods Casino theme and is the son of jazz legend Bucky Pizzarelli.

For tuning the guitar, see http://www.personal.psu.edu/users/f/p/fpm108/glw/lessons/lesson2.htm