DJ Class’ new track, titled um, “Bitch Ass Niggarrrrr” arrives at an interesting time for club music. Elements of the Baltimore sound have made their way to the radio (from four-on-the-floor pap like Usher’s “O.M.G,” to Waka Flocka Flame’s violent, dance records full of gun-shot percussion and more shouting than rapping) and into art-rap (Kanye’s “All Of The Lights” and Lil B’s “Ride Up” to name two up-to-the-minute examples), but club music itself remains as underground as ever. And if there were a sign that hometown producers are finally sick of trying to court mainstream attention, it would be this convulsive, completely off-putting, weirdly catchy track from Mr. “I’m The Ish” himself. A hybrid of two club classics (Class’ own “Tear Da Club Up” and Scottie B’s “Niggaz Fightin”), featuring an artfully chopped Boondocks sample (shades of Class’ masterful “Shimmy Shimmy Ya” refix) that couldn’t be less radio-friendly (or human friendly for that matter) and some incongruous auto-tune crooning, “Bitch Ass Niggarrrrr” is a harebrained attempt to merge Class’ singular street-pop sensibility with the kind of defiant, anti-social club music that he helped create almost twenty years ago–and it works way better than it really should.