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 Shuko Mizuno: Fantasia for Violin and Piano(2003), Paganini Violin Concerto No.4 - 2nd Mov (パガニーニ ヴァイオリン協奏曲第4番 第2楽章)