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 Ivan Dyma & Nikolay Kurdyumov - Fuzzy bird Sonata (T. Yoshimatsu), Saxophone Orchestra (17 saxes) - Moonlight serenade / In the mood