Jury in New York to decide whether Ed Sheeran's "Thinking Out Loud" is plagiarism. Plaintiffs are heirs of Ed Townsend, an American musician and producer who co-wrote the song with Marvin Gaye.

Musicologists and lawyers warn that the outcome of the trial could extend to the rest of musical creation. The risk is the multiplication of conflicts over copyright and a form of "paranoia" that would develop among musicians terrified of copying each other, they say.