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 Shostakovich - Ballet Suite No. 1 - Romance - Part 3/6, Menuhin plays Paganini Violin Concerto No. 1 in D major, Op. 6, MS 21 - Part 1/4, Handel - 18 Pieces for a Musical Clock: Air in A minor, HWV 604 (arr. guitar)