DISCS.(PREVIEW)(Sound recording review)

ROCK ``Echolalia.'' Something For Kate. (Murmur): When the term ``Australian music'' comes up these days, record buyers are likely to think of the disposable dance beats of Kylie Minogue. But the rock side of the Aussie experience has a long, glorious history from AC/DC to Midnight Oil and beyond. Unfortunately, a lot of notable, contemporary Aussie rock from the likes of Powderfinger, Alex Lloyd and Silverchair has been overlooked on this side of the ocean. With luck, that won't happen with Melbourne's oddly named Something for Kate. The band's label certainly has faith in the group: Its debut American album is a two-CD set featuring the original Aussie album plus 11 other tracks, including five recorded live. Though ``Echolalia'' is named after a mental …