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 Shostakovich: Dance (from Suite for Variety Orchestra, arranged for violin and piano), Poulenc: Violin Sonata - I. Allegretto con Fuoco, Op. 119, Grieg: Violin Sonata No. 1 in F major - II. Allegretto quasi andantino, Op. 8 (2013)