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 Vivaldi: Concerto for 2 Violins in A minor, RV 522 (Op. 3 No. 8) | Brian Lewis, Caroline Smoak, Moszkwoski: Suite for Two Violins - I. & IV. | Grigory Kalinovsky & Masha Lakisova, violins, Brahms: Viola Sonata in F minor, Op. 120 No. 1: II. & IV. | Andrew Gonzalez; Anton Smirnoff