Producer and Garbage drummer Butch Vig isn't sure what exactly will be on the soundtrack to Dave Grohl's documentary about Sound City Studios. Vig has been producing the sessions for the film, which is about the studio where Nirvana recorded Nevermind. His last work on the project was a recent session with Grohl and Nirvana bassist Krist Novoselic. Vig tells NME, "We're not really sure how it's all gonna end up at this point, but it's been fun. There's still quite a bit more work to do and we hope to finish up in the next three or four months, and try get it all mixed and completed sometime in the fall."

Stone Temple Pilots' first announced show of the year is headlining the Rock Allegiance festival on September 1st in Hershey, Pennsylvania. The lineup also includes Three Days Grace, Seether, Buckcherry , Fuel, Puddle of Mudd, Black Stone Cherry, Foxy Shazam and Redlight King.

STP are expected to tour in late summer and early fall to mark the 20th anniversary of their debut album, Core.

Rage Against the Machine guitarist Tom Morello is hoping to lead a guitar army for Occupy Wall Street's May Day protest in New York's Bryant Park. Organizers hope to enlist 1000 guitarists to play with Morello during the demonstration. If you want to join in, all you need is to own a portable string instrument.

The "Guitarmy" also plans on handing out shakers for kids to play.



In Stores Tomorrow:

Jack White: Blunderbuss (Third Man/Columbia)
The White Stripes and Raconteurs frontman steps out under his own name for the first time.

Brad: United We Stand (Razor and Tie)
The side project of Pearl Jam guitarist Stone Gossard returns.