I was really sad the article didn’t have a video of the hymns it spoke of, I’m similarly really interested now w in seeing an example of pitch accent you speak of in action, could you please link a video which you feel shows it well in play? Thanks!
Sure, here is an example of the rudram chanted in ghanam mode, there is a brief example given in the beginning similar to what i explained in my above comment. This is from the yajur Veda I believe, some scholars date these chants close to 3000 years old. https://youtu.be/5VP-NTPEjGg