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 Trigger Horns™ Kaos™ Horizontal 3 Trumpet Train Horn w/ Valve - TRGH171, Trigger Horns™ Habanero™ 4 Trumpet High Output Train Horn w/ Valve - TRGK3166