Karaoke (カラオケ, portmanteau of Japanese kara 空 "empty", and okesutora オーケストラ "orchestra") is a form of interactive entertainment or video game in which amateur singers sing along with recorded music (or a music video) using a microphone and public address system. The music is typically a well-known pop song minus the lead vocal. Lyrics are usually displayed on a video screen, along with a moving symbol, changing color, or music video images, to guide the singer. In some countries, a karaoke box is called a KTV. It is also a term used by recording engineers translated as "empty track" meaning there is no vocal track.