Also Read: What Exactly Does a Hollywood COVID Compliance Officer Do?For Reznor, the challenges began in the composing process — which, for a film set in 1930s Hollywood, required him and Ross to replace their usual electronic music with everything from big-band jazz numbers to orchestral arrangements. “Our usual practice of scoring is it’s the two of us sitting in a room, and what leaves that room is the final project,” he told TheWrap.