After an abundance of teasers and preview clips, there's finally an official trailer for Sound City, Dave Grohl's upcoming documentary on the famed Los Angeles recording studio. In it, artists including Tom Petty, Stevie Nicks, Lars Ulrich and Neil Young chat about what made the studio – and its fabled Neve 8028 analogue recording console – so wonderful, and what the turn toward digital recording has meant for the studio, and for music itself. Sound City will debut at the Sundance Film Festival in January, and is expected to hit theaters the following month.