Yes, it totally makes sense now!
“O Fortuna” is a medieval Latin Goliardic poem written early in the thirteenth century, part of the collection known as the Carmina Burana. It is a complaint about fate and Fortuna, a goddess in Roman mythology and personification of luck.
In 1935-36, O Fortuna was set to music by the German composer Carl Orff as a part of his cantata Carmina Burana where it is used as the opening and closing number. It opens on a slower pace with thumping drums and choir that drops quickly into a whisper building slowly into a steady crescendo of drums and short string and horn notes peaking on one last long powerful note and ending abruptly. A performance takes a little over two and one-half minutes. [Source]