Several weeks after Lars Ulrich revealed that the members of Metallica were "pretty close" to letting the tape roll on sessions for their next album, Robert Trujillo has offered his own small glimpse behind the scenes.

"We're working on these songs and we're having a blast. We are being productive and having fun," Trujillo tells Rolling Stone, laughing that the new songs are coming out "sounding like Metallica."

Asked whether the new record might end up serving as an extension to 2008's Death Magnetic, Trujillo shrugs, "I can't say that yet. I really can't relate it to any album; I think every Metallica album is unique in its own way. What we're doing is special and unique in its own way, but still keeping it heavy. For me as a listener, part of the journey I'm on with Metallica, there's just a certain edge that needs to be there."

Without offering any real specifics, Trujillo did seem to indicate the new album won't be a significant departure from the band's trademark aggressive sound.

"Before I even joined Metallica, I used to train for tours, when I was in Suicidal Tendencies, to Ride the Lightning. There's nothing like jogging the trails to, like, 'Fight Fire With Fire,'" he mused. "I can tell you that what we're doing sounds heavy, but again, each album is its own little experience. So we'll just have to wait and see."

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