Terz guitar (terz, German: third) refers to either a small sized classical guitar or to the practice of tuning a standard guitar a minor third higher than standard guitar tuning (as though a capo were on the third fret of the guitar). The scale length is generally 530 mm (20.8 inches), though sometimes as long as 560 mm (22 inches). Mauro Giuliani wrote extensively for the Terz guitar as a compliment to the prime (standard) guitar. Acceptable alternate spellings for "Terz" include "Tierce", "Third", and "Tertz."
Strings makers now produce strings that allow Terz-guitar tuning on standard scale length guitars at normal string tension.
- Schneider, John (1985). The Contemporary Guitar, p.157. ISBN 0-520-04048-1.