The material ranges from rough sketches to nearly complete songs that were in the mixing stage at the time of the producer’s death. Which of those songs will see the light of day is an ongoing discussion between SOPHIE’s family — Long, his two sisters and their parents — and SOPHIE’s labels, Australia’s Future Classic and the United Kingdom’s Transgressive Records. (Both declined to comment.) Long notes that the decision regarding what to release ultimately rests with the family. Whatever does come out, says Long, will involve him. He says all of SOPHIE’s unreleased music is in his possession: “I don’t know what anyone else could do, really, because they don’t have access to it.” He also was a key member of the producer’s inner circle, having served first as a tour manager and live engineer, then as mixing engineer on recorded projects. Long worked on SOPHIE’s 2018 album,