In broadcasting, rotation is the repeated airing of a limited playlist
of songs on a radio station or satellite radio channel, or music
videos on a TV network. They are usually in a different order each
time. However, they are not completely shuffled, so as to avoid
varying the time between any two consecutive plays of a given song by
either too much or too little.
Stations playing new music typically have a short rotation of around
four hours, while stations playing "classics" may go as long as eight
College radio and indie radio stations sometimes have no
particular rotation, only the music director's suggested lists for the
disc jockeys, or are totally freeform radio. Broadcast automation
systems handle a limited rotation quite well, in turn making voice
tracking easy. Even if a live person is present, the automation system
at commercial stations usually picks the music ahead of time out of
the current rotation, thus the DJ becomes only an announcer.
Heavy rotation or power rotation is a list of songs that get the most
airplay on a radio station.
^ King, Darrell W. (2010). This Business of Gospel Music. Darrell King. p. 152. ISBN 97