The Experience Music Project and Science Fiction Museum is accepting applications for its 2011 Sound Off! competition, now in its 10th year.

The competition for musicians 21 and under has been a launch pad for music careers. Dyme Def, Schoolyard Heroes, The Lonely Forest and Brite Futures (formerly known as Natalie Portman’s Shaved Head) are among the past winners.

Applications can be submitted online and must be received by Nov. 8. All participants must be 21 years of age or under as of March 5, 2011.

Twelve semi-finalists will be chosen to perform live on Feb. 12, 19, 26 or March 5, 2011. They will then compete in a finals show for a number of prizes, among them a chance to perform at the 2011 Bumbershoot festival.

All finalists from this year’s competition are featured on a new compilation CD, “Live From Sound Off! Volume Three.” The CD is available through iTunes, CD Baby and the EMP / SFM store.

For video of last year’s Sound Off! winners, Great Waves, follow this link. For additional information on how to enter Sound Off! visit the EMP Web site or e-mail soundoff@empsfm.org.