Miming in instrumental performance

Miming in instrumental performance or finger-synching is the act of musicians pretending to play their instruments in a live show, audiovisual recording or broadcast. Miming in instrument playing is the musical instrument equivalent of lip-syncing in singing performances, the action of pretending to sing while a prerecorded track of the singing is sounding over a PA system or on a TV broadcast or in a movie.

Source: Wikipedia — Miming in instrumental performance (CC BY-SA 4.0)