Anthony Pirog showcased some unique musical concepts at Twins Jazz on Wednesday. (Photos by Josh Sisk/FTWP)

The format of the group was nothing new: a trio of guitar (Pirog), bass (Mark Foster) and drums (Larry Ferguson). Ferguson, a veteran of the Army band Pershing’s Own, wielded a standard drum kit; that, however, was where convention ended. Foster brandished a six-string, fretless electric bass, while Pirog augmented his electric guitar with a small army of effects pedals. Together, they launched into a set of mostly Pirog originals, frequently unnamed but mostly characterized by the distorted guitar and slow, heavy drumming associated with post-rock bands such as Slint and Bedhead.