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 Jean Sibelius Violin Concerto-Allegro ma non troppo by Nicolas Koeckert, Sibelius Violin Concerto - Allegro moderato (fragment) by Nicolas Koeckert, Orquestra Sinfônica do Paraná-Tchaikovsky Violin Concerto