SUMAC (Aaron Turner on guitar and vocals, Nick Yacyshyn on drums, and Brian Cook on bass) invests in the recursive exercises of chaos and control, which manifest on the band’s second album What One Becomes. The trio’s debut The Deal (2015) revealed a new side of Turner’s combustible songwriting and guitar work, further expanding on his efforts in Isis and Old Man Gloom. On the new album (recorded by the prolific engineer Kurt Ballou of Converge, who has also recorded High on Fire and Torche), the trio has elevated the songs’ complexities with a greater entanglement of velocity, density, form, and function. The results are a testament to the tour-honed collective intuition and technical skills of drummer Yacyshyn (Baptists), bassist Cook (Russian Circles, These Arms Are Snakes, Botch) and Turner. The music of What One Becomes requires that each player be attuned to the dynamics and the tension within the multilateral structures.