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 Gundula Janowitz; Mozart, Misera dove son!, Maria Kiehr, Caldara: Per Il Mar del Pianto Mio, David Wigram, Boy Soprano. Mendelssohn, O Rest in the Lord