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
StarrBoard fretted instruments. The piano-like note markers on the fretboard reflect a semitone string tuning system, although Starrett experimented with various microtonal tuning systems over the years. At least eleven StarrBoards were built before Starrett ceased production of the instrument. Most of the instruments were electric, although at least one was purely acoustic and two had wired frets and strings for electronic processing to provide MIDI output. The StarrBoard is no longer being manufactured, although a derivative instrument called the harpejji is being made. StarrBoard The StarrBoard is a stringed musical instrument invented by John D. Starrett and patented on July