Hopefully you don't mind me replying here - do you mean this piece by Lully? I remember it from the start of many lectures.
https://www.youtube.com/watch?v=uORg1aeD_Og
Inverential Peace most honorable brother.
i do know that there has been many great Divinely inspired master works accompanying those most valuable study aids as the YT videos from Gnostic Students are.
But the specific master piece that i had been searching for was the one composed by Jan Dismas Zelenka, and of course it was named The Bronze Serpent. Again a thousand fold thanks to Most Honorable Brother Lion of Judah for ending my search for a classical masterpiece that has spoke to me from the moment i heard it.
But rest assured i will investigate Jean Baptise Lully Divinely inspired works as well
All Glories be to God!!..