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 No Sound issue on the iPad iPhone and iPod touch - Chinese Guqin Zither, A Lover's Concerto (Minuet in C major) on iPlay CG (Most Playable iPhone / iPod Touch music app), 大正琴 Nardan Harp - Mixture of guitar, piano, and old typewriter.