Some seven-string players, notably Lenny Breau, have added a higher string. Unfortunately, to tune an added string a fourth above the existing high E is usually problematic. For a nylon-string guitar, Breau discovered a particular brand of fishing line effective, but to avoid breakage on steel-string he either had to tune down or employ a custom-built instrument with a shorter-than-usual scale-length.
A less common employment of the extra string is within the usual range, to increase the richness of voicings, e.g. in Major Thirds Tuning on a seven-string the usual range of E2 to E4 is maintained but patterns are simpler, chords may be voiced more richly, and keyboardistic (or "pianistic") playing is easier.
Exploits and Customizations