Of all the great Nineties guitar bands, Mogwai might be the one fighting hardest to keep the decade’s anything-goes spirit alive. The Glasgow space-rockers have never lost their faith in ear-bleeding noise. On their superbly titled seventh album, they go for epic guitar savagery, weaving feedback with melody in the majestic surge of “You’re Lionel Richie.” They mess with keyboards on tracks like “How to Be a Werewolf,” exploring the jagged electro grooves of groups like Neu! and Stereolab. Every band should mature like the Mogwai lads: still inventive, still challenging themselves and still insanely loud.