You might have spotted Ava Mendoza on Bill Orcutt’s Four Guitars tour earlier this year, a meeting of four exceptional players of diverse backgrounds: Wendy Eisenberg from jazz and art song experiment, Shane Parrish from the finger-picked blues-drone world, the unclassifiable Orcutt, and Mendoza, a bold expander of the electric blues rock universe. She’s played with everyone—William Parker, Nels Cline, Matana Roberts, and Fred Frith among others—and led free-jazz, noise-rock, blues-encrusted Unnatural Ways through two albums, blending McLaughlin and Son House-ish textures. The Circular Train expands on this syncretic vision, building towering edifices of guitar tone and setting them to flames.