The uncomfortably named headliner, Child Abuse, supplies the rock with a thundering atonal techno-thrash that can send audience members into aural convulsions. The New York City duo uses Casio keyboards and double-bass-pedal drumming -- along with hissing, guttural vocals -- to build its mighty wall of sound. Thee Scarcity of Tanks is a huge, multi-city collaborative that features a rotating cast of noisemakers playing minimalist, skronky music to back leader Matthew Wascovich's spoken-word rants.