What are examples of music considered sad that especially moves you? What do these songs remind you of? This is "Balada de la trompeta," by the Spanish singer Raphael. The song, as the lyrics evoke, imply a trumpet's ballad for the past that has died, whatever the past may mean to the singer and the listener of this song. The past, as sung, could represent many things, to me.

https://www.youtube.com/watch?v=Ipi9pFoIMS0