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 Bohuslav Martinů - Sonata for Violin & Piano No.3, H. 303 - Pokorný / Holý, Bohuslav Martinů - Sonata no.1 for violin and piano (1929) - Skálová / Holý