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 Mozart - Violin Concerto No. 1 KV 207 - 2. Adagio, Mozart - Violin Concerto No. 1 KV 207 - 3. Presto, Mozart - Violin Concerto No. 1 KV 207 - 1. Allegro moderato