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 John Bull: Ut sol fa mi (God save the Kinge) - Pieter Dirksen, J.S. Bach: Nun komm der heiden Heiland BWV 660a - Bernardini, Luckhardt, Dirksen