With the rise of DJ culture in the 1990s, we saw the turntable outsell the guitar. Kids were wanting to learn how to mix (or how to scratch ala DJs like Craze and A-Trak), and in the UK and Japan ...

Because every DJ needs to know them. Scratching: A technique in which a vinyl record is pulled back and pushed forward on a turntable (wickawicka). Fader: A volume-control slider on a mixing board.