Chicago Underground Duo is the long-running collaborative project of composer/trumpeter/electronicist Rob Mazurek (Exploding Star Orchestra, Isotope 217, New Future City Radio with Damon Locks) and composer/drummer/mbiraist Chad Taylor (jaimie branch’s Fly or Die, Marshall Allen’s Ghost Horizons, Luke Stewart’s Silt Trio). Hyperglyph is their first album in 11 years, and 8th in the absolute cabinet of wonders that is the Chicago Underground Duo.

The pair have played music together in a multitude of formations over nearly three decades, including their ongoing partnership in Mazurek’s large-format-skyward-expressionism vehicle Exploding Star Orchestra, in the expanded Chicago Underground Trio & Quartet (with guitarist Jeff Parker), and in a plethora of other assemblages. The early albums by the Duo have proven to be embryonic blueprints for the avant-jazz / electronic / indie rock hybridizations of the time, making them majorly important moments in the articulation of the “jazz” dimensionality of the then-burgeoning "post rock" sound. That sound, of course, was being transmitted far and wide due to the success of these groups as well as Mazurek’s Isotope 217 project with Jeff Parker, and the Chicago Underground’s frequent collaborators in Tortoise.

But the sounds being created by this extended family are and were far from static. Just as most of the still-working artists born of that Chicago era have evolved, reconfigured, and grown, Chicago Underground Duo has undergone a number of musical moltings, with the project always in the background of disparate individual aural investigations — always an option, always an outlet. As the project drops off and picks back up, the concurrent personal evolutions of Mazurek and Taylor make the Duo a true reflection of their own lives and friendship.