At which recording studio was Metallica's The Black Album primarily recorded?

Metallica's The Black Album was primarily recorded at One on One Recording Studios in Los Angeles. The facility, also known as One on One Recording, hosted the main sessions from October 1990 through June 1991.

The band also spent about a week at Little Mountain Sound Studios in Vancouver, British Columbia. Additional overdubs and mixing took place at A&M Studios in Hollywood. These locations are sometimes blended together in summaries of the album, but One on One is the principal studio associated with the recording.

The sessions were shaped by producer Bob Rock's insistence that the musicians work together more as a live band. Metallica had often assembled parts separately on earlier records, so the new process caused tension but helped create the album's notably forceful and polished ensemble sound.