Seeing the potential for an extraordinary recording, in 1939 the BBC persuaded the Matḥaf al-Miṣrī (Museum of Egyptian Antiquities) to schedule a world broadcast. The bandsman James Tappern was engaged to perform on the historic instruments.
In what some people saw as the notorious “curse of King Tut”, five minutes before the live broadcast was to begin the watchmen’s lanterns failed and the museum was plunged into darkness; but candlelight saved the day, and enthralled listeners heard what were presumably sounds last heard over 3,000 years earlier.
This according to “Recreating the sound of Tutankhamun’s trumpets” by Christine Finn (BBC news: Middle East 17 April 2001). Above, a photograph of Tappern at the museum. Below, a narrative fleshes out the story; the recordings of Tappern playing the trumpets begin around 10:45.