At the heart of what "Shack" is/does is improvisation and a deep love of ensemble invention/playing. The language that the group works from might be loosely termed American popular song. "Shack" is not constricted (much) by time periods, genre and what some folks might expect from a quartet.
"Shack" does not perform original compositions; rather, they decompose, deconstruct, reconstruct - what some folks call "mash-up". Artists that have made up some of the ingredients in the sonic stew prepared by "Shack" include Thelonious Monk, James Brown, Miles Davis, Wayne Shorter, The Meters, Jimi Hendrix, The Beatles, Marvin Gaye, Bob Marley, Bob Dylan, The Rolling Stones, Led Zeppelin, Prince, and Nirvana.
Hartford-area performances by "Shack" have included a 2010 residency at the Wadsworth Atheneum Museum of Art as part of their Summer Film Program (which featured the best in independent and art films, productions from the international scene and cinema classics). Other "Shack" performances have included Tisane Euro Asian Cafe, Black-Eyed Sally's, the Knox Parks Greenhouse, La Paloma Sabanera Coffee House, Szechuan Tokyo Restaurant, and The Uncertainty Music Series at Never Ending Books in New Haven.