The electrified agitators Magik Markers emerged from an extended slumber to release July’s Isolated from Exterior Time: 2020 as a Bandcamp surprise, their first set of new material since 2013’s Surrender to the Fantasy. Less than four months later, the now-scattered New England band members are following up with 2020. It’s a generous double dose from a trio whose rare appearances make their adventurous, incendiary rock transmissions all the more special.

Beginning with a serrated lead-in from bassist John Shaw, “CDROM” churns along in classic form. Elisa Ambrogio arrives with bristling guitar, and drummer Pete Nolan pummels his way across a set of toms, hands loose but steady. Ambrogio sketches scenarios of interpersonal friction in her lyrics, working in wry barbs that sometimes hide amid her smeared instrumental parts. The fuzzy edges of her guitar and Shaw’s bass bleed into each other, and Nolan puts their knotty interplay in sharp relief with his clear, cantering rhythm.

At minute five the band changes pace, and Nolan turns his attention to dry crashes of cymbals and snares. After leading most of “CDROM” with prickles and flourishes, Ambrogio shifts into a scorching series of riffs composed equally of tone and feedback. “Like a clown in a basement, I’m layin’ the bricks for you,” she sings, leveraging a Poe plot as an unusual but definitive threat. Shaw gradually disappears, Nolan returns to his toms, and Ambrogio winds down, carrying the track out on a lingering guitar hum. Her final notes fade like a question mark written in disappearing ink, evaporating with an air of enticement.