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 R. Scedrin: A la Albeniz | Sebastian Bertoncelj, D. Popper: Polonaise de concert op. 14 for cello and piano | Sebastian Bertoncelj, B. Pucihar: Cello quartett - Pizzicato Blues, Finale (PART 2)