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 Robert Schumann Fantasy for Violin and Orchestra Op. 131, Kate Bush, arr. Theo Bleckmann: A Dream of Sheep/ Under Ice, Antonio Vivaldi Concerto for Violin, Cello and Continuo RV547 (First Movement)