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 "Minuet 1" from Suzuki Violin Book 1, with piano, "Twinkle Theme" from Suzuki Book 1, slow, violin only, "Andantino" from Suzuki Book 1, slow, violin only