If You have an Asus Xonar, Auzentech or HT Omega soundcard you will probably need to download the following tool to be able to use the Equalify plugin in Spotify.
These cards all use the same soundchip and use some generic drivers as a base for their brand drivers, and they interfere with how windows is supposed to work.
This tool is provided as a “workaround” for the issue and will disable the built in GX/EX features of the soundcard. There is also an option to re-enable everything in the tool.
Keep in mind that you use this tool at your own risk. It has been tested on our side, and there is no apparent side-effects.
Equalify might not load, even with this workaround, so if you decide to buy it, you do so at your own risk.
Download: Equalify GX/EX Fix