On May 1, 2007, an e-mail sent to those on the Beastie Boys' mailing list revealed the album is all instrumental.
OK, here's our blurb about our new album — it spits hot fire! — hot shit! it's official... it's named THE MIX-UP. g'wan. all instrumental record. "see i knew they were gonna do that!" that's a quote from you. check the track listing and cover below. you love us. don't you?"
On June 21, 2007, a legal stream of the entire album was released on BrooklynVegan.com. Drummer Mike D said that "even though The Mix-Up is a 'post-punk instrumental' album, the Beasties have no plans to ditch vocals for good. In fact, they are currently planning another version of the album that will feature collaborations with 'a pretty wide array' of 'mostly newer' vocalists." Two singers speculated to be featured on the vocal version were Jarvis Cocker and M.I.A..
In an interview with The Aquarian Weekly, published in February 2008, the band was asked if they were making a statement about the status of hip-hop music by releasing an album strictly of instrumentals. “In a way, the album was a reaction to our hip hop," said Ad-Rock "Our last record was an all rap record, so when we started recording [The Mix Up] we wanted to work with some instruments, and it just sounded cool, so we ke