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 Zither + Soprano Duo Allure live in Tokyo, A. Vivaldi - Sonata in F (RV52) - Zither, Bach: Italian Concerto - II Andante - for Zither