You are the DJ. awesome Bemani game where you've got the turn table. though 5-key is popular 7-key is better.

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A real-time DJ simulator that requires players to press keys arranged similar to a piano and/or spin a turntable and/or pressing a pedal when instructed by falling dashes. Three versions currently exist: beatmania (having 5 keys and a record), beatmania IIDX (adding two keys, current game being produced), and beatmania III (5 keys, a record, and a pedal). People playing the game seem like they have no lives, as it takes awhile to play without looking at the controller and to spin the turntable efficiantly. There is one US release of beatmania to date and the release was not as accepted compared to Guitar Hero II, released around the same time, so the only way to get better songs is to import the games.

A game in which you use 5 or 7 keys and a turntable to add your own sounds to music. It is a general arcade machine you can find usually packed in a section with other Bemani. Other simular games to this are Guitar Freaks, Drummania, and keyboard mania. Those games all use the same graphical layout.

B.) A Beatmania playing (see above) will sometime use the name of the game as a joking way to say jacking off or masterbation

A DJ simulation game that uses 5 keys and a turntable.

A "DJ simulation" game in which the player must push 5 keys and a turntable in time with songs 1:10-1:45 in length.