video in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Schöpfungsmesse in B-Dur (Hob. XXII:13) - 06 Agnus Dei - Joseph Haydn (Mass No. 13 in B flat major)