At which studio in North Hollywood was Metallica's 1991 album, commonly called The Black Album, recorded?

Metallica's 1991 album, commonly called The Black Album, was recorded at One on One Recording in North Hollywood.

The sessions began in October 1990 and continued through the following year. The facility, also known as One on One Recording Studios, provided the setting for the album's demanding production under Bob Rock.

Recording was unusually intense for Metallica. Rock asked the members to work more collaboratively and repeatedly challenged their performances, arrangements, and lyrics. The band recorded and revised material over an extended period, contributing to the album's polished, tightly controlled sound.

The studio should not be confused with the Bay Area facilities associated with some earlier Metallica recordings, or with Sound City Studios, which became famous for many other rock projects. One on One was located in the Los Angeles area, even though Metallica had deep roots in the San Francisco Bay Area.