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 Soprano Ylenia - Magnificat (Dio ha fatto in me cose Grandi) with Harp & Violin, Harp and Violin - Nuovo Cinema Paradiso, Harp and Violin - Intermezzo da Cavalleria Rusticana (Sancta Maria)