The second annual CITY SKIES ELECTRONIC MUSIC FESTIVAL returns to Kavarna for three days of drones, chirps, noise, rhythms and surfing the sine wave. This year the festival features an impressive lineup of expert knob-twiddlers and space travelers from around the country unleashing a barrage of sounds. Performers include Duet for Theremin and Lapsteel, Broken Symmetry, Masik, Richard Lainhart, Don Hassler and Richard Devine & Joshua Kay, along with several others. Through May 9. $10-$30. Thurs.-Fri., 7 p.m.; Sat., noon. 707 E. Lake Drive, Decatur. 770-335-7445. www.cityskies.com. (Chad Radford)
NINE INCH NAILS are back on the road following last year's megawatt Lights in the Sky Tour. Teaming up with old buds and newly reformed JANE'S ADDICTION for the first time since 1991, the industrial kings still have a few tricks up their sleeves, but expect to see a much more scaled-down production this go-around. There's been talk that Nine Inch Nails will go on hiatus after this tour, so catch them while you can. $25-$99. 7 p.m. Lakewood Amphitheatre, 2002 Lakewood Way. 404-443-5000. www.livenation.com. (Alicia Wages)
MAY 15 MASTODON Heavy metal mammoths play Center Stage. www.ticketmaster.com.
MAY 17-JUNE 20 ZANNA, DON'T! Actor's Express sets the record straight at queer-centric Heartsville High. www.actors-express.com.
MAY 17 HER SPACE HOLIDAY Hits the road after a four-year hiatus. www.thedrunkenunicorn.net.
MAY 24 JOHN OLIVER "The Daily Show with Jon Stewart's" British correspondent travels to the Punchline. www.punchline.com.