The primary difference between Karaoke and sing-along songs is the absence of the lead vocalist.
Sing-alongs (present since the beginning of singing) fundamentally changed with the introduction of new technology.
Home theater systems took off, and karaoke went from being the main purpose of the stereo system to a side feature.
As more music became available for karaoke machines, more people within the industry saw karaoke as a profitable form of lounge and nightclub entertainment.
It is not uncommon for some bars to have karaoke performances seven nights a week.
commonly with high-end sound equipment superior to the small, stand-alone consumer versions.
In 2004, Daisuke Inoue was awarded the tongue-in-cheek Ig Nobel Peace Prize for inventing karaoke, "thereby providing an entirely new way for people to learn to tolerate each other." Karaoke soon spread to the rest of Asia and other countries all over the world.Instead of giving his karaoke machines away, Inoue leased them out so that stores did not have to buy new songs on their own.Originally, it was considered a somewhat expensive fad, as it lacked the live atmosphere of a real performance and 100 yen in the 1970s was the price of two typical lunches, but it caught on as a popular kind of entertainment.Dance floors and lighting effects are also becoming common sights in karaoke bars.Lyrics are often displayed on multiple television screens around the bar.