Playing the Extended 7-String Classic Guitar
by Matthew Grasso
Perhaps contrary to popular thought, there have been many diverse configurations of the 7-string guitar. The Russian 7-string guitar of the 19th century featured an open G-major tuning (DGBDGBD). Napoleon Coste played a 7-string that had a floating bass string tuned to a low "D" or "C". The modern 7-string usually has a low "B" or "A" string. Occasionally I have seen a 7-string with a higher "A" string as in one of Lenny Breau's guitars. A former student of mine plays an electric 7-string that is a hybrid of a bass and a guitar. It has the first five strings of a guitar (E, B, G, D, A), and the two lower strings of a bass- E and A, and it is fan fretted. Thus, the conceptions of a 7-string guitar are seemingly endless.
I had the great honor of having northern California luthier Greg Byers build my instrument. The low seventh string on this guitar has two extra frets below the nut in an "extended" configuration. The scale length of the seventh string is 729.6 mm; the other six strings are at the standard 650 mm. The seventh string can be tuned to a low "A" or "G". In addition, the first string on this instrument has twenty-two frets or a high "D" as opposed to the high B at the nineteenth fret of most classic guitars- so the upper range of my Byers 7-string is extended as well.
Greg Byers included another unique design innovation on the 7th string of my guitar - a Schubb sliding capo originally conceived for use on the fifth string of the 5-string banjo. The capo is attached to the edge of the fretboard and slides up and down the first five frets of the 7th-string, adding even more versatility and almost instant tuning options. Very little fine tuning is required. When the open 7th-string is tuned to a low "A", I can stop the string chromatically up to a low "D", or if tuned to a low "G", the player can stop the string chromatically up to a low "C". The open string tuning allows me to choose between two string tensions.
The sliding capo on the 7th string allows a change in tuning without having to touch the tuning machines, learn alternate tunings or physically change the 7th string for reasons of optimal string tension. For instance, if the 7th string is tuned to low "A" and I set the capo at low "C", the notes above the "A" or "C" remain the same from a reading or fingering perspective.
I use D'Addario Pro-Arte hard tension strings for the standard 6 strings and a D'Addario NYL056W (.056 gauge) for the 7th string. I have experimented with .052 and .054 gauge strings for the 7th and they simply do not have enough tension for a low B or a low A at 650mm. Whether or not you have a 7-string guitar with the extended 7th string feature, I recommend the .056-gauge D'Addario for the 7th string. I buy my strings from Strings by Mail www.stringsbymail.com.
I think of the "extended range" of my instrument in two ways: melodic and harmonic/contrapuntal. My guitar's overall range is a major 6th lower and a minor 3rd higher than a traditional guitar. Thus, I have one octave more in melodic range, and in any position I have greater harmonic/contrapuntal facility. This guitar provides access to a range of two octaves and a sixth, up to three octaves in any playing position. In some transcriptions I play notes that exist within the melodic range of the 6-string, but which are simply not possible to play on a 6-string; i.e., they are only accessible in the harmonic range of the 7-string guitar.
Example 1
The extended 7-string facilitates a greater number of possibilities in chord voicing, and the number and variety of possible counterpoint lines are also enhanced.
Example 2
Transcribing for the 7-String Guitar
Here are some general ideas about transcription discovered through orchestrating for guitar solo, duo, trio, and quartet- all using the extended 7-string guitar to some degree:
Solo Guitar
If the melody is in the soprano voice, I suggest sketching that part first, then the bass line. The inner voices in piano or orchestral writing seldom work as written. You will need to rearrange the voice leading to fit the guitar. With Bach's music, however, I am able to add bass lines to fill out the implied harmonies. Obviously, the added 7th string affords more bass line possibilities as well as greater opportunities for variations in chord voicing.
(Example 3)
Guitar Duo
A skilled guitar duo can sound like one giant guitar. One way to orchestrate four parts for the duo format would be to delegate the bass and alto voices to Guitar 1 and tenor and soprano to Guitar 2 (Example 4). This approach will produce an "interlocking" effect. The 7-string guitar makes it possible to double the bass in which Guitar 2 will play the contra bass, tenor and soprano. I developed this idea from symphonic orchestration; if you listen carefully you'll notice that the cellos and contra basses are often doubled in octaves. This technique really fills out the sound (Example 5), whereas playing the bass part in octaves on one guitar will weaken the orchestration.
(Example 4)

(Example 5)

(Example 6)
Guitar Trio and Quartet
In my opinion, the guitar trio and quartet become less intimate and sound more like chamber or orchestra music. My transcriptions for guitar trio consist of one 7-string guitar and two 6-string guitars, whereas my transcriptions for guitar quartet consist of two 7-string guitars and two 6-string guitars. One of the most monotonous things you can do when transcribing for guitar trio or quartet is to have all the guitars playing all the time. When you hear a full symphony orchestra play, are all the instruments playing all the time? By allowing certain instruments to rest, you promote timbre and dynamic contrasts.
Notation Issues
With the added range of the 7-string guitar, I have encountered two major notation issues. The first problem lies in how to write the lower notes without excessive ledger lines. One solution is to write an "8" beneath any bass note lower than low "D".
(Example 7)
The second problem lies in writing chords with excessive ledger lines. My solution is to use the bass clef written at pitch.
(Example 8)
Some would argue that the bass clef should be written as though sounding an octave lower in pitch, just as guitarists use the treble clef. If the bass clef is written at pitch, however, you'll never exceed three ledger lines above or below the staff; by contrast, writing the bass clef as though sounding one octave lower in pitch can lead to some very high ledger lines above the staff.
(Example 9)
Chord Voicings, Scales, Etc.
The extended 7-string guitar presents the arranger and player with a myriad of new fingering and chord voicing possibilities. For example, let's take the "F" chord. There is only one way to play the voicing of this chord on a 6-string guitar, but on the 7-string, this chord voicing can also be played across the 7th through 4th strings. This fingering gives the chord a much richer sustaining quality as all the notes are being played on the bass strings.
(Example 10)
In playing scale passages one can reduce the amount of shifting because of the extended range available in a single position. The three-octave G-major scale can be played in two positions.
(Example 11)
The cross-string trill shown in Example 12 is not possible to play on a 6-string guitar, but is completely idiomatic to the 7-string.
(Example 12)