Who served as the recording engineer on Metallica's The Black Album?

Randy Staub served as the recording engineer on Metallica's The Black Album.

Staub's engineering role involved capturing and shaping the performances during the album's demanding sessions. Mike Tacci is credited as assistant engineer, while George Marino handled mastering for the original release. These are separate technical roles and are often confused when album credits are summarized.

Bob Rock produced the record, with James Hetfield and Lars Ulrich credited with assistant production. Rock's production approach pushed the band toward a more collaborative recording method, including live group performances and a stronger emphasis on the interaction between drums, bass, guitars, and vocals.

The engineering and production team helped create the album's unusually clear, powerful sound. The record was mixed several times during a difficult process, and its polished presentation became one of the defining characteristics of Metallica's 1991 musical transition.