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 Humes & Berg Stonelined Philharmonic Non-Transposing Tunable Straight French Horn Mute (#134), Humes & Berg Stonelined Aluminum Swish Wah-Wah Trumpet Mute.mov, Humes & Berg Stonelined Cleartone Trumpet Mute (#103)