San Francisco duo Callow are inordinately preoccupied with mood. Everything they do is measured and drawn out, lending unbearable proportions of tension to every song they make. Composed of Red Moses on guitar and Sami Knowles on drums and keyboard, with both singing, Callow describe their music as "ghost western," which is about as apt as anything. While stopping just short of slowcore - that aching subgenre aimed at fetishists of melancholy - there is certainly no shortage of doom and gloom at work, here. The minimalism of the compositions highlights every sudden shriek or guitar stab, giving their songs the feel of a good, slow-burn horror movie. When you're not anxiously anticipating when the other show will suddenly drop, it's easy to get lulled into Callow's fatalistic crawl.

CALLOW, 8 p.m., Le Voyeur, 404 E. 4th Ave., Olympia, no cover, 360.943.5710