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 Roland FR-1 V Accordion video on accordion sounds by Chris Rybak, Alulnelu - A Romanian folk dance - Nat Accordion convention March 11-13 2010 - Dallas, Texas, Bluegrass Music Introduction by Eddie Collins and the Upham Family Band