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 Antonio Vivaldi Lestro Armonico A-moll. Concerto for two violin and piano, Johannes Brahms Lullaby, F. Mendelssohn Violin concerto 1st movement