Tapping is a guitar playing technique where a string is fretted and set into vibration as part of a single motion of being pushed onto the fretboard, as opposed to the standard technique being fretted with one hand and picked with the other.
It incorporates the techniques of hammer-on and pull-off, but these are usually only performed by the fretting hand, and in conjunction with conventionally picked notes, whereas tap passages involve both hands and consist of only tapped, hammered and pulled notes. Some players (such as Stanley Jordan) rely extensively or exclusively on tapping.
Tapping is also called tap style (tapstyle), touch-style, and two-handed tapping, though the latter is somewhat of a misnomer as "one-handed tapping" is equivalent to the common hammer-on.
Tapping is the primary technique intended for some instruments such as the Chapman Stick and is the alternative method for the Warr Guitar and others.
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, and several instruments have been created specifically to utilise the method. 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 where 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 harpejji is a tapping instrument which is played on a stand, like a keyboard, with fingers typically parallel to the strings rather than perpendicular. All of these instruments use string tensions less than a standard guitar, and low action to increase the strings' sensitivity to lighter tapping.