Music: Learning Curve

SPIN DOCTOR: Deejays in the ’90s are what double-neck guitars were to rock bands in the ’80s: cool to have but not essential. Lately, though, deejays have been taking center stage themselves. DJ Rap is a female pioneer. The British singer/deejay’s U.S. debut, Learning Curve, combines pop vocals with drum-‘n’-bass grooves. A few tracks are a bit dull, but on the single Good to Be Alive her skills are on full display.