Operating at the crossroads of jazz, chamber music, European folk and Americana, Tin Hat (formerly Tin Hat Trio) imagine a world where there are no boundaries between the New York recital hall, the Parisian street corner and a front porch on the Bayou. All helpless descriptors aside, this is just a fantastic ensemble of "musicians' musicians," the kind that could get by on chops alone but prefer to keep the improvisations subtle and textured. While nobody could accuse the old Tin Hat lineup of violin, acoustic guitar and accordion/celeste/pump organ of being ''"old hat,''" the departure of founding member Rob Burger has allowed the group to expand its sound palette even further outside the norm. Tin Hat'''s delirious new album The Sad Machinery of Spring, which came out January 30th on Hannibal/Rykodisc, adds trumpet, toy piano, marxophone, harp, three different types of clarinet and the seldom heard bass harmonica to the group'''s peculiar fever dreams. There's never been a better time to let Tin Hat evoke memories you never knew you had. (ER) Find out what else is happening in Los Angeles tonight at Prefix L.A. Events!