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 "Sheep May Safely Graze", J. S. Bach, Flute Quartet, Pipe Organ, Timpani - "Let the Earth Rejoice", Dale Wood, "Elegy", George Thalben-Ball; Flute, Bassoon, Pipe Organ