https://sourceforge.net/p/equalizerapo/discussion/general/thread/be274c4f/?limit=25
Actually there's a way to do that using OBS, I've just discovered it (I'm assuming you kinda know how to use OBS, at least the basics):
1. Start up EqualizerAPO configuration editor and add up Reafir in subtract mode, then manually just click around a few times on this graph it's just to build the file correctly. Close the editor
2. Open up OBS, create your audio source and add your reafir filter (remember it's name) in Subtract mode, check automatically build noise profile ,wait a few secs so it picks up the noise and uncheck that box so it stops. You can close OBS now.
3. Open up this file on any text editor(assuming you are using OBS Studio as I am): %appdata%obs-studioasicscenes[yourprofilescenesnamehere].json
4. Search for your audio source name, next to it you should see "chunk_data"
5. Copy everything between those "" (it should look like a buch of code)
6. Open up your EqualizerAPO config.txt, it should contain a line with your VSTPlugin and chunk data
7. Replace your manually created chunk data with your OBS chunk data and you are done!
Hope this helps you guys :). Actually I just created this account so I can comment this tutorial lol