On last year’s Reduce by Reducing (Fire Inc./Some), the Amsterdam-based trio Stilluppsteypa minimalized their approach to electronic music: their microscopic glitches, set against gut-rumbling tones, ominous hums, and irregular beats, were a far cry from their earlier rock-tinged noise experiments. Later in 1999, with the ponderously titled Interferences Are Often Requested: Reverse Tendency as Parts Become Nearly Nothing (Ritornell), the group relaxed a little, taking a broader approach but sounding more cohesive than ever. The CD–some of which was recorded at STEIM, the prestigious Amsterdam electronic music center–is filled with shimmering electronic tones that feel three-dimensional: move around your speakers and the music seems to change shape. The staticky clatter of “Is This (Better Than) What I’m Used To?” is dynamically riddled with sharp edges, pockets of air, and piercing sibilance, but “Mostly Midrange Vocals” and “Plenty Loud, Thank You” are extremely quiet soundscapes constructed of small gestures–like five- or six-minute Bernhard Gunter miniatures. Although electronics remains the group’s primary focus on a newer release, Not a Laughing Matter, But Rather a Matter of Laughs (Fire Inc.), they’ve found ways to incorporate slightly more conventional instrumentation: the electronically tweaked trumpet playing of Andy Diagram (Spaceheads) and the voice of Japanese singer Hanayo are folded into the hum as naturally as any other sound source. The Chicago trio TV Pow–which has a joint CD with Stilluppsteypa due from the excellent electroacoustic improv label Erstwhile next year–and Illusion of Safety also perform. Sunday, November 5, 10 PM, Deadtech, 3321 W. Fullerton; 773-395-2844.