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 CHORUS INSIDE - 2012; Giuseppe Verdi, "Brindisi" dell'opera "La Traviata", Святейший патриарх всея Грузии Илия II, "Ave Maria"