The click track originated in early sound movies, where marks were made on the film itself to indicate exact timings for musicians to synchronise their recordings to the moving image. It can be thought of as a recording of a metronome in that it serves a similar purpose.
The click track was sufficiently useful as a synchronisation tool that it became part of standard recording technology, whether for films, radio or other sound recording and the click track took one of the tracks on a multi_track tape recorder.
By the late 20th century, particularly in the realm of synthesizers and digital recording, the click track became computerised and synchronising different instruments became more complex, at which point the click track was supported or replaced by SMPTE time code.
The clicktrack originated in early sound movies, where marks were made on the film itself to indicate exact timings for musicians to accompany the film.
The clicktrack was sufficiently useful as a synchronisation tool that it became part of standard recording technology, whether for films, radio or other sound recording and the clicktrack took one of the tracks on a multi-track tape recorder.
The clicktrack may also be used as a form of metronome directly by musicians in the studio or on stage, particularly by drummers, who would listen via headphones to maintain a consistent beat.