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 Danube Music Festival 2007 - Virtuosi & Liljana Butler, Danube Music Festival 2007 - Lantos, Apap & EVA Quartet - Live at the Krems Church, Danube Music Festival 2007 - Ivo Papasov