With the innovative North Carolina band Ahleuchatistas, guitarist Shane Parish pushed the boundaries of the early-’00s math-rock scene by incorporating international influences, as well as a healthy dose of unbridled experimentalism. An educator and essayist, Parish has spent the last few years serving up mind-expanding interpretations of traditional American folk music, as heard on 2016’s Undertaker Please Drive Slow, released on John Zorn’s Tzadik Records. His latest project, the Shane Parish & Sean Dail Duo, finds Parish reunited with former Ahleuchatistas drummer Dail as the two embrace their “Beefheartian sensibilities.” Sax-drums duo Ghost Trees and post-jazz explorers Kenosha Kid share Saturday’s bill.