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 Donizetti - Concertino for Violin, Viola & Orchestra. Andante & Rondo, Vitali - Chaconne, Maria Lazareva violin, Spohr - Concertante for Violin, Harp and Orchestra, Adagio