Labeling an artist a “fluffy light-rock Muzakhead” is the kiss of death for musical credibility, conjuring nightmarish visions of Air Supply and other somnolent saps. But there’s no denying that the music of Brits Dido and Travis doesn’t exactly ooze testosterone. Dido’s breezy “Thank You,” sampled by Eminem for “Stan,”…

Heavy-metal satanists, gangsta rappers, and childhood-damaged aggro-rockers only wish they could create the destructive racket San Diego screamo machine the Locust makes on Plague Soundscapes. With the subtlety of a sledgehammer, the quartet speeds through 23 blasts of incoherence in just over 20 minutes. Some titles: “Anything Jesus Does I…