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 Giovanni Sollima - Terra Aria (Mario Brunello, Angelo Zanin, Damiano Scarpa, Riccardo Pes), Josef Werner - Elegia per quattro violoncelli op.21 - Percorsi Musicali 2012