A few years ago, turntables were reserved for hardcore DJs and beat-mixers. Today, they’re everywhere. In cellphones, in homes and now, in video games. And we’re not talking about no-name third-party manufacturers, we’re talking about big names in the industry. For example, Numark and Genius just announced Scratch: The Ultimate DJ Videogame Controller, which will be the newest peripheral on Microsoft’s Xbox 360 and Sony’s PlayStation 3.Naturally, the scratch deck will be showcased next week at the Electronic