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 F. Schubert - Moment Musical Op.94 (D.780) No.1 in C Major - Alfred Brendel, Kempff plays Schubert Piano Sonata in A Minor D537 (Op.164)