I'm planning to train a sound classification model for ml5 among a group of CV models. I've found a relatively small (around 1000-2000 pieces of sound effects files) yet well labeled dataset of sound effects: Adobe Audition Sound Effects. The dataset, or the sound effects library, is high quality while open-sourced and royalty-free. All the files were well named thus perfectly labeled for the training, here're several examples:
>>> Animal Animal Dog Bark 08.wav >>> Crash Crash Car Crushing 01.wav >>> Horror Horror Wood Crackle 02.wav >>> Sports Sports Boxing Gloves Hit 03.wav
For every category, the most files were named by “Category” + “Object” + “event”, which is perfect for multi-layer training. I'll start looking for more references and writing the code this week.