In the world of electronic music and especially at this year’s Decibel Festival, UK duo Orbital are nothing short of titans. Formed in 1989 by brothers Paul and Phil Hartnoll, the group went in a matter of years from recording its first hit “Chime” on their father’s home stereo to being one of the biggest acts of the ‘90s “electronica” breakthrough in America (a precursor to the current “EDM” craze), along with the likes of Daft Punk, the Chemical Brothers, and the Prodigy. Orbital didn’t sound quite like any of those peers, though; instead, they expanded the rarefied, uplifting UK rave sounds of the early ‘90s until they took on almost classical heft, scoring songs whose melodic strands intricately unfolded and reconfigured even as a house pulse anchored them to physical dance floor functionality. They return this year with Wonky, their first album after an 8-year lull, and a return to form equal parts nostalgic and triumphant. With Paul Chambers. ERIC GRANDY

Thu., Sept. 27, 8 p.m., 2012