Mount Wittenberg Orca is an EP by American indie rock band Dirty Projectors and Icelandic singer and songwriter Björk, released on June 30, 2010 in digital-only format and on CD and vinyl by Domino Records on 24 October 2011. News of the album was announced on Björk's official website on 26 June 2010, four days before its release. The vocals are dominant on all the tracks, which form an experimental and pop continuum. Background and composition The genesis of what would become Mount Wittenberg Orca began in 2008, when Stereogum created a tribute album for Björk's 1995 studio album, Post, entitled Enjoyed: A Tribute to Björk's Post New York indie band Dirty Projectors covered the song "Hyperballad" and wrote of their love of the Icelandic singer: "She writes these classic melodies but breaks them apart so that it’s sort of up to you as the listener to put them back together. The song ends up meaning so much more because of the effort you have to give to it." On March 26, 2009, Brandon Stosuy of Stereogum announced that Björk and Dirty Projectors were joining forces for a one-time benefit show at Housing Works Bookstore & Café in Manhattan. All proceeds went to Housing Works, a non-profit fighting AIDS and homelessness, and was presented as part of their "Live from Home" series of concerts. Stosuy himself approached the artists about appearing at Housing Works but was unprepared for their approach to the concert. Instead of performing music from their back catalogs, Dirty Projector's David Longstreth had composed a brand new suite written for five voices (Björk and Longstreth on lead vocals, and Dirty Projectors' female trio Amber Coffman, Angel Deradoorian, and Haley Dekle). Two opening acts were chosen: Kurt Weisman by Longstreth and fellow Icelandic artist Ólöf Arnalds by Björk. The benefit concert was held on 8 May 2009 with M.I.A., St. Vincent, David Byrne and Haley Joel Osment, amongst 250 others, in attendance. The night began with acoustic renditions of songs from Dirty Projectors' previous album, Bitte Orca before lead singer Longstreth introduced the material he composed especially for the evening, announcing, “We’ve never played it in front of anyone before, and we are just incredibly honored to sing this music with Björk." The six song cycle recounts the moment band member Amber Coffman made eye contact with a whale in northern California. In their review on the concert,