Tapping
Tapping is a playing technique that can be used on any stringed instrument, but which is most commonly used on guitar. The technique involves a string being fretted and set into vibration as part of a single motion. This is in contrast to standard techniques that involve fretting with one hand and picking with the other. Tapping is the primary technique intended for instruments such as the Chapman Stick.
Tapping is an extended technique, executed by using either hand to 'tap' the strings against the fingerboard, thus producing legato notes. Tapping generally incorporates pull-offs or hammer-ons. For example, a right-handed guitarist might press down abruptly ("hammer") onto fret twelve with the index finger of the right hand and, in the motion of removing that finger, pluck ("pull") the same string already fretted at the eighth fret by the little finger of their left hand. This finger would be removed in the same way, pulling off to the fifth fret. Thus the three notes (E, C and A) are played in quick succession at relative ease to the player.
While tapping is most commonly observed on electric guitar, it may apply to almost any string instrument.
Additionally, several tapping instruments, such as touch guitars, have been created specifically to use the method. These instruments contain many adaptations to make them more conducive to tapping on, such as including pads near the nut to mute open strings, using string tensions lower than a standard electric guitar, using a low action to facilitate lighter tapping, and using more sensitive pickups. The Bunker Touch-Guitar (developed by Dave Bunker in 1958) is designed for the technique, but with an elbow rest to hold the right arm in the conventional guitar position. The Chapman Stick (developed in the early 1970s by Emmett Chapman) is an instrument designed primarily for tapping, and is based on the Free Hands two-handed tapping method invented by Chapman in 1969 in which each hand approaches the fretboard with the fingers aligned parallel to the frets. The Hamatar, Mobius Megatar, Box Guitar, and Solene instruments were designed for the same method. The NS/Stick and Warr Guitar are also built for tapping, though not exclusively. The StarrBoard and harpejji are tapping instruments that are played on a stand, like a keyboard, with fingers typically parallel to the strings rather than perpendicular.