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 Spirit of Meditation: Best Meditation Music, Relaxing Sounds of Nature, Sacred New Age Music, Qi Gong: Soothing Relaxing Sounds for Qigong Exercises, Yoga, Reiki and Tai Chi, Moonlight Sleep Music: Guitar Sad Songs with Sound of Shadow Nature