...here are some recordings you might want to have a listen to at the end of your Assumption Day.
1904 recording of Dom Pothier directing the Choir of the Benedictines of San Anselmo singing "Gaudeamus omnes," the ancient Introit for the Assumption (changed after 1950 to "Signum magnum" but now both are options).
Master Leonin of Paris, "Propter Veritatem," before 1950 the Gradual chant of the day.
And just for the heck of it, some Ordinaries appropriate for today's Solemnity:
Have a blessed feast day!