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 Violin Recital - Hejre Kati by J. Hubay, Violin Recital - Gavotte by J. Ph. Rameau, Violin Recital - String Quartet No. 15, K. 421 (3/4), Minuet in D minor by W. A. Mozart