The term "canned music" refers to pre-recorded music that is played over a public address system or on a radio program. Sometimes, it is also referred to as "elevator music", "background music", or "Muzak". Other synonyms for canned music include "mood music", "easy listening music", "instrumental music", and "soft rock". These terms describe music that is played for creating a certain atmosphere, often without any vocal content. The term "canned" in canned music refers to the fact that this music is pre-recorded, ready to be played in any setting. Although some people enjoy listening to canned music, others find it repetitive and boring.