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 Waltz of the Wolves - a flute duet by Kazushi Saito & Wil Offermans, Etude 1 Wind Tones, For the Contemporary Flutist, Wil Offermans