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 Violini Belli Violin Duo - Prokofiev from "Peter & the Wolf", Manami Violin Solo Tchaikowsky's "Meditation", Manami Plays Tchaikowsky's Scherzo for Violin