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 Valse "Rosen aus dem Sueden" by J.Strauss for Violin and Piano, Hungarian Dance No. 5 by Brahms for Violin and Piano, "Largo" by Veracini for Violin and Organ