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 Galactic Gong, Harp & Singing Bowls (Music for Deep Relaxation, Meditation, Yoga & Stress Relief), Music for Meditation, Stress Relief, Focus & Clarity - Kundalini Yoga Gong, Rain & Whistle Pranayama