It was either a miracle, I have a special phone, I have no idea.
What I did:
- Entered ODIN mode
- Flashed CWM recovery for Note 3 (for my exact phone model, Samsung N900W8, it's a Canadian One) -- GENUINELY thought I'd trip Knox, but CF auto root was not working, so this was my option.
This somehow did not trip Knox at all, then all I had to troubleshoot a bit. I tried a few older versions of the SuperSU for CWM package, none of them worked... then finally I found out that these were old versions, I downloaded the 1.89 superSU package for CWM/TWRP, and now I am officially rooted.
Once I booted in, I had to load SuperSu which then said "Do you want to disable KNOX to get root working?" or something to that extent.. At my own risk I did that, still didn't trip the KNOX counter.
Booted up, works, able to use root on a lot of different apps.
I have no idea if it's a miracle it did not trip Knox, if I have a magic phone, etc.. but I thought I'd share.
This is root, not a custom kernel or anything.
Second bit: I was able to get call recording with Call Recorder working as long as I used to CAF (root required) option. No other option worked, not kernel, not with installed Alsa, etc..
If anyone wants any more specific information about my phone, I will gladly share. All I know is knox 0x0 with root is pretty sweet.