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 Malcolm Arnold - Brass Quintet No. 1 Op. 73 - III. Con brio, Malcolm Arnold - Brass Quintet No. 1 Op. 73 - I. Allegro vivace, Irving Berlin - Puttin' on the Ritz