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 1901 Martin 0-28 Parlor Guitar, Bell Notes - The Selmer Mark VI, Bombs & Church Bells, Hank Knox - Toccata Terza, Girolamo Frescobaldi