Because it was Rock's first time producing a Metallica album, he had the band make the album in different ways; he asked them to record songs collaboratively rather than individually in separate locations. He also suggested recording tracks live and using harmonic vocals for Hetfield. Rock was expecting the production to be "easy" but had trouble working with the band, leading to frequent, engaged arguments with the band members over aspects of the album. Rock wanted Hetfield to write better lyrics and found his experience recording with Metallica disappointing. Since the band was perfectionist, Rock insisted they record as many takes as needed to get the sound they wanted. The album was remixed three times and cost . The troubled production coincided with Ulrich, Hammett, and Newsted divorcing their wives; Hammett said this influenced their playing because they were "trying to take those feeling of guilt and failure and channel them into the music, to get something positive out of it".