I recall the first film opening with bars of a song which also features prominently in the ride.

Apparently the song itself was written for the rides in 1967 [1] and I assume is based off even older pirate shanties. Certainly reminds me of songs from the book Treasure Island (1883).

[1] https://en.wikipedia.org/wiki/Yo_Ho_(A_Pirate%27s_Life_for_M...