This extremely loud and grungy Pacific Northwest foursome, torchbearers of the overhyped ''Seattle Sound,'' take their name from a Russ Meyer soft-porn movie; their music is only slightly more genteel. Imagine the heaviest of Black Sabbath heavy metal, only somewhat speeded up and with added touches of humor, and you have a good approximation of the Mudhoney way of life. The band led by very, very loud guitarists Steve Turner and Mark Arm seems to care less about songs than it does about reproducing the violence its members hear in their heads. The result conjures images of skyscrapers bashing, but wait: Fudge is not all noise. There's a surprisingly friendly harmonica on ''Pokin Around'' and some uncharacteristically textured guitar strumming on ''Something So Clear.'' At root, though, Mudhoney is for those who value high-volume guitar for its own sake. B-

