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 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. In some cases, instrumentalists will mime playing their instruments, but the singing will be live. In some cases, the instrumentalists are miming playing their instruments and the singers are lip-synching while a backing track plays. As with lip-synching, miming instrument playing has been criticized by some music industry professionals and it is a controversial practice.