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 M.Kalomiris -- Sonata for Piano and Violin -- I. Agitato (1948), P.Koukos - Χορικά/ "Chorika" for piano, violin and string orchestra (2006), M.Pallantios - Sonata for Violin and Piano/ Σονάτα για Βιολί και Πιάνο (1940)