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 Jankovic - Lecic: Beethoven Cello Sonata No.4 in C major, Op.102, No.1 (Mov 1), Jankovic - Lecic: Beethoven Cello Sonata No.1 in F Major, Op.5 No.1 (Mov 1), Jankovic - Lecic: Beethoven Cello Sonata No.5 in D major, Op.102, No.2 (Mov 2&3)