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 Arcadia Quartet - Janacek no 2 p 1, ONT - Mendelsohn Violin p1 - Ilian Garnet (youtube p2), ONT - Mendelsohn Violin p1 - Ilian Garnet (youtube p1)