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History
The first Karaoke machine was invented by Japanese musician Daisuke Inoue[1] in Kobe, Japan in the early 1970s.[2] After becoming popular in Japan, karaoke spread to East and Southeast Asia during the 1980s and subsequently to other parts of the world in its modern state.
Entrance Hall of a K-TV in Taipei
Entrance Hall of a K-TV in Taipei
In Japan, it has long been common to provide musical entertainment at a dinner or a party. Japanese drummer Daisuke Inoue was asked by frequent guests in the Utagoe Kissa, where he performed, to provide a recording of his performance so that they could sing along on a company-sponsored vacation. Realizing the potential for the market, Inoue made a tape recorder that played a song for a 100-yen coin.
Instead of giving his karaoke machines away, he 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 500 yen in the 1970s was the price of two typical lunches, but it caught on as a popular entertainment. Karaoke machines were initially placed in restaurants or hotel rooms; soon, new businesses called karaoke boxes, with compartmented rooms, became popular. 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
Technology
A basic karaoke machine consists of a microphone, a means of altering the pitch of the recorded music, and an audio output. Some low-end machines attempt to provide vocal suppression so that one can feed regular songs into the machine and suppress the voice of the original singer; however, this is rarely effective. Most common machines are audio mixers with microphone input built-in with CD+G, Video CD, Laser Disc, or DVD players. CD+G players use a special track called subcode to encode the lyrics and pictures displayed on the screen, while the other formats natively display both audio and video.
Most karaoke machines have technology that electronically changes the pitch of the music so that amateur singers can sing along to any music source by choosing a key that is appropriate for their vocal range, while maintaining the original tempo of the song. (There were some very old systems that used cassettes, and these changed the pitch by altering playback speed, but none is still on the market, and their commercial use is virtually nonexistent.)
A popular game using karaoke is to randomly type in a number and call up a song, which participants take a turn to try to sing as much of as they can. In some machines, this game is pre-programmed and may be limited to a genre so that they cannot call up an obscure national anthem that none of the participants can sing. This game has come to be called "Kamikaze Karaoke" or "Karaoke Roulette" in some parts of the United States and Canada.[citation needed]
Many low-end entertainment systems have a "karaoke mode" that attempts to remove the vocal track from regular audio CDs. This is done by center removal, which exploits the fact that in most music the vocals are in the center. This means that the voice, as part of the music, has equal volume on both stereo channels and no phase difference. To get the quasi-karaoke (mono) track, the left channel of the original audio is subtracted from the right channel. The Sega Saturn also has a "mute vocals" feature that is based on the same principle and is also able to adjust the pitch of the song to match the singer's vocal range.
The crudeness of this approach is reflected in the often-poor performance of voice removal. Common effects are hearing the reverberation of the voice track (due to stereo reverb being put on the vocals); also, other instruments (snare/bass drum, solo instruments) that happen to be mixed into the center get removed, degrading this approach to hardly more than a gimmick in those devices.
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