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 Mendelssohn: Violin Concerto in E minor - 2nd movement (Yada Lee), Tchaikovsky: Violin Concerto - 3rd Movement, Thai Royal Anthem (arr. Dr. Colin Kirkpatrick)