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 set in blind holes, which allows the wood to retain more strength for a given weight. They can, however, also be set in holes drilled right through the wood, to look like older pins. Threaded pins can be installed with an arbor press, and do not need to be re-set, but should be backed off a few turns when changing a string to keep pin height even. Tuning pins may be known as wrest pins or zither pins, regardless of the instrument on which they are used. They are used on instruments with many close strings, as they are more