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 Tatiana Grindenko: Violin Concerto in D major, Op. 77 - Movement 1, Part 1 (Brahms), Wiłkomirski, Wiłkomirska: Piano and Cello Sonata in G minor, Op. 65 - Movement 1 (Chopin), Arthur Grumiaux: Violin Concerto in D, Op. 35 (Tchaikovsky) - Movement 3 - 1960