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 "Chant sans Paroles" (Tchiakovsky) Cello Solo by Mons Jan Schwiller, "Circus Galop" Xylophone Solo with Orchestra Homophon Record C 1912, The EMG Presents: Anvil Polka(Parkow) by the American Republic Band