videos 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 Veni Sancte Spiritus, Come Holy Spirit - Gregorian Chant with lyrics, Da Pacem Domine, Give Peace O Lord - Catholic Hymns, Gregorian Chant, Alleluia, Diffusa est gratia - Catholic Gregorian Chant Songs