Former Metallica producer Bob Rock talked about his Metallica days and revealed the interesting relationship between James Hetfield and Lars Ulrich. He said that, it’s like a “marriage “. Here’s the statement:

“Lars and James are equally the life-blood of Metallica; that is a marriage when it comes to Metallica.

Not at all short-changing Kirk Hammett. Kirk has always been the mediator between the two, but James and Lars – when they’re both strong- they’re the sound of Metallica. When one or the other dominates in any situation, it changes drastically.”

He also mentioned about Lars Ulrich’s drumming skill and musical opinion:

“To me, Tommy, as a drummer, is like an open nerve end, whereas Lars Ulrich is probably closer to Keith Moon than anything. Tommy is a classic back-beat drummer; he is the basis and a rhythm kind of guy. He does have syncopation, but he’s a rhythm machine. Whereas what makes Lars Ulrich’s drumming so wonderful and so unique is that he’s reactive to the music.

‘The Black Album’ was him consciously trying to be more of a backbeat, keep-the-time kind of guy. Most of his fills and unique drumming all comes out of the fact that he plays to the riff of the music, much like with The Who. The Who and Metallica are very similar, because Keith Moon played to Pete Townshend’s solid rhythm playing, and Lars Ulrich has always played to James Hetfield’s solid rhythms.

I don’t believe Lars thinks in the terms that most drummers do, I think he thinks in a musical world that is unique. He plays to the riff, rather than trying to control the riff.

Click here to entire interview via Ultimate-Guitar.