So, I have ase3inclupdates and atmospheric_sound_effects. I think ase3inclupdates is the newest one, but it's smaller than atmospheric_sound_effects. ase3 is about 20mbs while atmospheric_sound_effects is 60mb. That's quite a huge leap. Does ase3 still requires the old one? Do I need both of them installed, and do I use both of their esps? Mine is missing the clunky armor sound when you walk, so maybe I need to install the old one as well.

I think the latest ASE might be 3.0update4, whose readme says:

so, I think you need to install them all.

Edit: it's possible they've been repackaged in some other configuration and you have something I don't.

Know where I can find them all? The link at Planet Elder Scrolls is dead.