At which recording studio was Metallica's 1991 album, commonly called The Black Album, primarily recorded?

Metallica's 1991 album, commonly called The Black Album, was primarily recorded at One on One Recording Studios in Los Angeles.

The sessions began in October 1990 at the North Hollywood facility and continued through June 1991. The studio was a large, well-known Los Angeles recording complex whose room and equipment suited the band's search for a powerful drum and guitar sound. Metallica had also used the studio for ...And Justice for All.

Additional work took place elsewhere. The band recorded for about a week at Little Mountain Sound Studios in Vancouver, while overdubs and mixing were completed at A&M Studios in Hollywood. Those additional locations do not change One on One's status as the main recording studio listed for the album.

The album's production was unusually labor-intensive. Bob Rock asked the group to perform more collaboratively, and the band repeatedly refined takes to achieve the desired feel. The recording process became part of the 1992 documentary A Year and a Half in the Life of Metallica.