Which Los Angeles recording studio was Metallica’s 1991 album recorded primarily in?

Metallica’s 1991 album was recorded primarily at One on One Recording Studios in Los Angeles. The band began the main sessions there in October 1990 and continued working through June 1991.

The album was not made in a single room from start to finish. Metallica also spent about a week at Little Mountain Sound Studios in Vancouver, British Columbia, while additional overdubs and mixing took place at A&M Studios in Hollywood. One on One nevertheless remains the principal recording location associated with the album.

The sessions were demanding because producer Bob Rock wanted the band to perform more as a unit. Earlier Metallica recordings had often been assembled from separately constructed parts, especially rhythm sections. For The Black Album, the musicians worked toward a more immediate, live-feeling performance, contributing to its heavier but more accessible sound.