Sören von Malmborg is a Swedish mixing and mastering engineer. He has worked with artists and songwriters such as Avicii, Alan Walker, Kygo, NONONO, Seeb, Vargas & Lagola, Tove Lo, A$AP Rocky, Noonie Bao, and Dagny.

"The Spectre" is a song by Norwegian record producer and DJ Alan Walker incorporating uncredited vocals provided by Norwegian songwriter and producer Jesper Borgen. It was composed by Jesper Borgen, Alan Walker, Marcus Arnbekk, Mood Melodies and Lars Kristian Rosness, with production handled by the latter four, and lyrics written by all composers as well as Tommy La Verdi and Gunnar Greve. "The Spectre" has a tempo of 128 BPM, is in the key of C♯ minor, and lasts for 3 minutes and 13 seconds. The song was released via Mer Musikk on 15 September 2017.