[psobot]

Hey! In order:

- I did consider using image processing techniques as opposed to decision trees, but the point here was not to come up with the most advanced and accurate classifier possible, but rather to build something simple and explainable to folks without an ML (or even a CA) background.

- I haven't tried this extensively on non-drum-like percussion, but that'd be a great follow up post.

[blt]

I totally understand your decision, but I bet a 1D deep convolutional network would do really well at this given a larger dataset. You can also do a lot of data augmentation by speed changes, filters, adding reverb, etc.