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 Winter Wonderland - F. Bernard - Violin Duet, Maria Plays Violin - Waltz: J. Brahms - May 9, 2009, Fantasy on Greensleeves - Violin Duet - Traditional