It's been one of the year's most buzzed-about music-related films, and now comes word that Dave Grohl's 'Sound City' documentary is off to a great sales start, hitting its first significant mark. The RIAA has just certified the long-form film for Gold status.

The RIAA Gold Longform Video certification is awarded for physical sales in excess of 50,000 copies. In the US alone, the film has sold over 100,000 copies between by physical and digital sales since it debuted at No. 1 on the iTunes Documentary chart earlier this year.

The 'Sound City' documentary is based around the legendary Los Angeles studio of the same name where many of the top records of the rock and roll era were created. The Foo Fighters frontman has personal ties to the studio as it is where he and Nirvana recorded their 1991 classic, 'Nevermind.' In addition, Grohl interviewed such peers as Nine Inch Nails' Trent Reznor, Metallica's Lars Ulrich, Slipknot and Stone Sour's Corey Taylor, Black Sabbath and Dio's Vinny Appice, Queens of the Stone Age's Joshua Homme and Ratt's Stephen Pearcy and Warren DeMartini and Rage Against the Machine's Brad Wilk and Tim Commerford among others.

The film premiered in January at the Sundance Film Festival and Grohl helped promote the movie by launching a series of 'Sound City Players' concerts with members of the Foo Fighters, Nirvana, Rage Against the Machine, Slipknot, Queens of the Stone Age, Black Rebel Motorcycle Club, Fear, Masters of Reality and more playing alongside rock vets Rick Nielsen from Cheap Trick, Rick Springfield, John Fogerty and Stevie Nicks.

For additional information on the 'Sound City' film and soundtrack, visit the dedicated website here.