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 Ambient Song #21, Sketch #31: Reverse Boomerang, Stereo Wet Reverb, and Strymon El Capistan and Timeline sounds, Ambient Song #9 [ Drone / Texture / Soundscape ]