Calum Builder is a Copenhagen-based Australian composer–instrumentalist. After years of approaching the pipe organ like a modular synthesizer, he built the (Re)constructed Pipe Organ from salvaged pipes taken from decommissioned churches across Northern Denmark. Its mechanics are fully exposed: motor, bellows, windchest, tubing. An organ laid bare.

His album Although Changed, I Arise the Same (Thanatosis) follows Poor_in_Spirit (OOH-Sounds, 2025), listed in Boomkat’s Discoveries of 2025, where his music was described as having “vibrant new energy...comparable to Éliane Radigue.” His work has also received a full six hearts in Politiken, described as “a beautiful and overwhelming experience.”

He has performed with the (Re)constructed Pipe Organ in churches, industrial spaces, and concert halls across Europe, including Marmorkirken and Brønshøj Water Tower in Copenhagen, Ballhaus Ost in Berlin, Grand Hospice in Brussels, Stavanger Konserthus, and festivals such as Organ Sound Art, Labor Sonor and N:ear.