It’s hard to keep up with Australian guitarist and sound artist Oren Ambarchi, not only because of the quantity of his recorded output (yesterday I listened to three LPs he’s on that had piled up by my turntable this year), but also because he seems to reinvent himself at every turn—changing instruments, contexts, groups, and vocabularies. He’s a member of thunderous drone merchants Sunn O))), and he’s collaborated with the likes of Jim O’Rourke, Keiji Haino, Keith Rowe, Günter Müller, Z’ev, Lasse Marhaug, and Ester Brinkmann. But in some ways he’s incredibly consistent, investing fully in the microscopic exploration of sound.