At which recording studio did Metallica chiefly record the album commonly called The Black Album?

Metallica chiefly recorded the album commonly called The Black Album at One on One Recording Studios.

The studio was located in Los Angeles, where the band began work in October 1990. The album’s recording period continued until June 1991, making the sessions an extended undertaking rather than a short studio visit.

The album article also lists Little Mountain Sound in Vancouver and A&M Studios in Los Angeles among the recording locations. One on One, however, is the principal studio associated with the sessions and is the clearest answer when asking where the album was chiefly recorded.

The lengthy process reflected the band’s intense collaboration with producer Bob Rock. The musicians and producer repeatedly revisited performances and arrangements as they sought a heavier but more polished sound. That approach helped distinguish the album from Metallica’s earlier, faster thrash-oriented records.