Anyone know where to find one?

I've been trying to find one for hours and I'm going mad! I'm using a Fiio headphone amp/dac thats connected to my USB and I want a system wide EQ band but it seems like it's impossible to find one
I don't know how relevant this is to you, but I'm using a Realtek sound card (some Taiwanese brand apparently) and it has a bunch of presets for EQ. No band though.
Tried SRS audiobox and it was a bag of shit.

I can't believe there isn't a solid piece of software that allows EQing for system-wide use. You would of thought they would be easily available.