Errata moves between highly formalized composition and intuitive improvisation. Formed in 2017 in Chicago by guitarist, cellist, and composer, Ishmael Ali, the unit also consists of close friends and collaborators Eli Namay and Bill Harris.

Their music exists, broadly speaking, between discernibility and noise, regularity and irregularity. More specifically, intentionally or not, the trio combines elements of jazz, 20th century classical music, and improvised music with Lehman-esque and Threadgill-ian grooves, often with math-rock adjacent sensibilities.


Ishmael Ali – guitar, electronics. composed tracks 1, 3, 5, 6

Eli Namay – upright bass. composed track 2

Bill Harris – drum set, electronics. composed track 4.