Metallica

Metallica, commonly known as "The Black Album," was recorded from October 1990 to June 1991 at One on One Recording Studios in North Hollywood, California. The album was produced by Bob Rock, who had previously worked with Mötley Crüe and The Cult, and marked a significant departure from the band's collaboration with Flemming Rasmussen on their earlier thrash metal records. Bob Rock pushed the band toward a more polished, radio-friendly sound with slower tempos, heavier emphasis on groove, and meticulous attention to tone, reportedly causing significant tension during the lengthy and expensive recording sessions, which cost approximately $1 million. Engineer Randy Staub handled the mixing, crafting the album's massive, tight drum sound and thick guitar tones, with James Hetfield re-recording rhythm guitar parts numerous times to achieve precise layering and sonic weight. Released on August 12, 1991, the album became one of the best-selling records of all time, fundamentally shifting Metallica's commercial trajectory and influencing the production standards of heavy metal throughout the 1990s.