The Philadelphia-bred Roots crew jumped in the studio with New York indie band TV on the Radio's Kyp Malone and Tunde Adebimpe to record a track for the film, 'Soundtrack for a Revolution.' The Danny Glover-produced documentary will feature contemporary artists reworking Civil Rights Movement-themed protest songs. Soul singer Anthony Hamilton, jazz trio Soulive and the Blind Boys of Alabama also contributed to the project.

Although it's unknown which protest/freedom song the Roots reworked, we do know that the group's frontman Black Thought sounded pretty darn good in his new role as singer, according to Okayplayer.com.

In other Roots news, the outfit have recruited some big names for their next project, dubbed 'Rising Down,' which is due in April. Mos Def, Fall Out Boy's Patrick Stump and Common are set to appear on the group's next effort, and rumors are swirling that A Tribe Called Quest's Q-Tip and Lupe Fiasco may also appear.