Algorithm combines a custom-made pipe organ with an automatic teller machine (ATM). Visitors enter the gallery space and see the organ from behind. In the towering, nearly 20-foot-tall interactive sculpture, a Diebold ATM sits inside the pipe organ, replacing the typical organ keyboard, pedals, keys, buttons, and knobs with various ATM parts including a card reader, keypad, speaker, display screen, receipt printer, and cash dispenser. Each financial transaction that visitors conduct generates a unique musical score that produces randomized notes and chords at varying degrees of volume by driving pressurized air through pipes selected via the ATM keyboard. The artists collaborated with composer Jonathan Bailey to create a composition of sounds that range from atonal material to more classically structured melodies, harmonies, and phrases.

Allora & Calzadilla, Algorithm, 2011. Photo by Andrew Bordwin. Allora & Calzadilla, Algorithm, 2011. Photo by Andrew Bordwin. Allora & Calzadilla, Algorithm, 2011. Photo by Andrew Bordwin. Allora & Calzadilla, Algorithm, 2011. Photo by Andrew Bordwin. Allora & Calzadilla, Algorithm, 2011. Photo by Andrew Bordwin.

Allora & Calzadilla
Algorithm, 2011
U.S. Pavilion, 54^th International Art Exhibition, presented by the Indianapolis Museum of Art
Photos by Andrew Bordwin.