What Morton called "Spanish" were the tresillo and habanera rhythms of the Cuban contradanza ("habanera"). Morton demonstrated the "tinge" to Alan Lomax in the 1938 Library of Congress recordings.[1] What is known in Latin music as the habanera rhythm is also known as the congo,[2] tango-congo,[3] and tango.[4]Then we had Spanish people there. I heard a lot of Spanish tunes. I tried to play them in correct tempo, but I personally didn't believe they were perfected in the tempos. Now take the habanera "La Paloma", which I transformed in New Orleans style. You leave the left hand just the same. The difference comes in the right hand — in the syncopation, which gives it an entirely different color that really changes the color from red to blue. Now in one of my earliest tunes, "New Orleans Blues", you can notice the Spanish tinge. In fact, if you can't manage to put tinges of Spanish in your tunes, you will never be able to get the right seasoning, I call it, for jazz.
It's not irony - it's the reason why they go to Cuba. The leader of New Orleans' famed Preservation Hall Jazz Band seeks to fulfill his late father's dream of retracing their musical roots to the shores of Cuba in search of the indigenous music that gave birth to New Orleans jazz.
https://en.wikipedia.org/wiki/A_Tuba_to_Cuba
I love NO music but I prefer r&b, blues, soul and funk. In fact NO music was my obsession many years ago and I'll always have a soft spot for it.
The doc looks interesting (I've not seen it unfortunately).