Is it chamber music? Is it jazz? Does it matter? In the vein of Amelie composer Yann Tiersen, Leonard Bernstein’s ballet sequences and the indie-Balkan outfit Beirut, the latest incarnation of Tin Hat (née Tin Hat Trio) straddles the genres to evoke a metropolitan experience, where sounds are piled beside each other in close quarters to commingle and create something altogether stronger than the sum of its parts. The group, who’s collaborated with Tom Waits and members of Mr. Bungle and is anchored by the versatile violinist Carla Kihlstedt, perform on Thursday, May 12, at 142 Throckmorton Theater. 142 Throckmorton, Mill Valley. 8pm. $18. 415.383.9600.