Guitar chord in the abstract musical-theory of chords for all instruments. For example, in the guitar (like other stringed instruments but unlike the piano), open-string notes are not fretted and so require less hand-motion. Thus chords that contain open notes are more easily played and hence more frequently played in popular music, such as folk music. Many of the most popular tunings—standard tuning, open tunings, and new standard tuning—are rich in the open notes used by popular chords. Open tunings allow major triads to be played by barring one fret with only one finger, using the finger like a capo. On guitars
Tuning mechanisms for stringed instruments and the sarod, but some like the esraj and Mohan veena often use modern tuning machines instead. Tapered pegs are also used on older European instruments, such as the Bulgarian gadulka and the hurdy-gurdy, as well as on flamenco guitars. Among modern western musical instruments, tapered pegs are most often used on violin family instruments, though usually the double bass uses tuning machines. "Peg dope" (also peg paste, peg stick, peg compound) is a substance used to coat the bearing surfaces of the tapered tuning pegs of string instruments (mainly violins, violas, cellos, viols and lutes ). Manufactured varieties are