The specific title of the very first electronic music track created by Nick Kortex is not explicitly mentioned in the available sources. However, his early works include albums like "Flashback" released in 2005, which appears among his earlier known singles before his extensive discography expanded. Given that Nick Kortex began focusing on electronic music after transitioning from cinema and theater studies, and joined the S.A.C.E.M. in 2003, it is likely that his initial electronic compositions date from the early 2000s.
In summary, while the exact first electronic track by Nick Kortex is not directly identified in the sources, "Flashback" (2005) is among his earliest released electronic music pieces, marking the beginning of his official discography in the genre.