darkrepulser :
Virtual_Singularity :
Did you go to Creative's website and download their latest drivers for the audigy fx, that they hopefully have available for download for whatever operating system you're using?
yes i already downloaded the latest driver and im on windows 10.
And so your system is recognizing the audigy fx then? Note that the headphone jack on the audigy would be the light green 3.5mm line out, if it's connected to your speaker setup, you may have to temporarily disconnect if you want to use your headphones directly from it.
Since the audigy fx is a 5.1 surround sound pcie sound card, it may be worth considering a 5.1 surround sound usb headphone adapter, eg the Kotion Each 2.0 (3D Virtual 7.1 Channel USB External Sound Card Adapter for PC Laptop Windows Mac OS Linux, Audio Adapter Cable, No drivers Needed) which goes for $10. There are many of these adapters, ranging from $3 -$15, some far upwards of that as well.
If your system doesn't recognize the audigy fx after downloading it's drivers for your OS, assuming there's nothing wrong with the pcie x1 slot you've plugged it into, it may mean your sound card is DOA.