The House Jacks is a professional a cappella quintet from San Francisco, founded in 1991 by Deke Sharon. The House Jacks describe themselves as a "rock band without instruments", their live shows typically include not only singing but also vocally imitating instruments such as trumpets, guitars, harmonicas and strings as well as taking audience-requests for songs and rendering them in musical styles unlike the original versions. The group primarily performs original material and is considered the first professional a cappella group to have a dedicated vocal percussionist. The group routinely tours the United States, Europe and Asia, has recorded numerous jingles and has garnered numerous recording and community awards. The group was signed to Tommy Boy records from 1994-1997, and Artilier Records from 2000-2005. They can be heard in the background music on NBC's The Sing-Off in the opening video, commercial transitions and elimination sequences. They have also created comedic bits and jingles for the radio personalities Mancow Muller and Rick Dees. From Wikipedia (https://en.wikipedia.org/wiki/The_Hou...) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/b...)