I DO NOT KNOW if THIS will plug into your tritton, but if it does, then this would work.
http://www.ebay.com/itm/Mad-Catz-Tritton-AX-720-v1-5-Headset-Inline-Cable-BULTRI90202INLINE-UG-/321450649117My model is the original.
http://www.ebay.com/itm/TRITTON-AX720-7-1-Dolby-Digitnal-Surround-HEADSET-for-XBOX360-PS3-PS4-PC-/262111882182?hash=item3d0715ebc6:g:cO0AAOSwHnFV3Wf3Notice the cord connecting to the headset to the box, the inline cable (where you can mute and adjust sound on the cord), detaches on the top and I have a place to connect my mic and headphones. The printer-like cable allows the mic to be used via usb to ps4.
If the first link works then, my description above, is what you would do.
it looks like you can not do anything that you want with your setup *as far as I can tell*.
If that does not work and you want to spend small amounts of money, then
1.
http://www.4surpluscity.com/mad-catz-tritton-ax-720-v1-5-headset-inline-cable.html2.
http://www.4surpluscity.com/mad-catz-decoder-box-with-dolby-digital-technology.htmlI am not sure of that sites validity, or anything, I just did some searching and found this combination to be the cheapest. (about 50-60% less than ebay)