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 Popper Requiem for 3 Cellos and String Orchestra @ Cello Akademie Rutesheim 2009, Stephan Braun Jazz-cello: Rococo Improvisation (Tchaikovsky), Jazzcello: Jobim - Once I Loved - Sung Yueh Chou + Stephan Braun