A rare solo release from Konrad Sprenger, alias of elusive Berlin composer-producer-instrument builder Jörg Hiller. A prolific collaborator, Sprenger has worked extensively with icons of American minimalism such as Ellen Fullman (with whom her recorded the gloriously eccentric song album Ort) and Arnold Dreyblatt (as a core member of the Orchestra of Excited Strings since 2009), as well as releasing their music on his impeccably curated label, Choose. As an instrument builder and installation artist, he has overseen the creation of a computer-controlled multi-channel electric guitar and, with Phillip Sollmann, a modular pipe organ system designed to be reconfigured from space to space.

In much of Hiller’s work, a scientific approach to acoustic phenomena co-exists with a pop sensibility and a sly sense of humour. Nowhere is this unique combination more in evidence than in his slim body of solo work, beginning with the startling diversity of instrumentation and compositional approaches heard on the short pieces of Miniaturen (2006) and Versprochen (2009), followed by the more single-minded exploration of the computer-controlled electric guitar on Stack Music (2017). Set brings together these various strands of Sprenger’s work into a wildly infectious, playful epic, performed by the composer and the mysterious Ensemble Risonanze Moderne. On the LP’s second side, we are also treated to a guest appearance from longtime collaborator Oren Ambarchi, on whose recent solo releases Simian Angel and Shebang Sprenger has made key production contributions. Ambarchi’s signature stuttering, swirling harmonics weave through a sparkling assemblage of electric guitars, acoustic instruments, percussion and electronics—though, given the deft use that much of Sprenger’s recent production work makes of midi-controlled sampled instrumentation, it’s anyone’s guess where the acoustic ends and the digital begins here.

As soon as the needle drops on the first side, we are inside a musical world that Set will inhabit for its 33 minutes: sparkling guitar harmonics and palm-muted notes, tuned percussion, crisp electronic drum hits, flashes of horns, and untraceable bursts of synthetic sound are arranged into a skittering polyrhythmic framework calling up the detail-rich percussive constructions of contemporary techno filtered through the pointillism of the post-serialist European avant-garde. Behind this shifting mist of particulate sound, winds and strings sound out held chords, reminiscent of Arthur Russell’s Tower of Meaning in their epic yet seemingly aimless drift. The relationship between elements is mysterious, appearing both carefully considered and almost random. Though never straying too far from where it begins, as the piece moves along, it spotlights increasingly bizarre instrument choices (shakuhachi and steel drums, anyone?) as well as momentary liftoffs into motorik propulsion. Set is a fascinating, mercurial thing: at once propulsive and fragmented, essentially static in form yet ever-changing in detail, unabashedly egghead in its construction yet sure to get the feet tapping.