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 Whispering Hope - Arranged for 4 Violins - 1st Violin Accompaniment - Free Violin Sheet Music, Santa Lucia - Arranged String Quartet - 2nd Violin Accompaniment - Free Violin Sheet Music