I'll try it in English - I think that's easier for you...

You have to plug the USB-cable of the DSS2 into the PS4. The USB-soundcard will be connected to the USB-port of the DSS2. The optical-out from the PS4 must be plugged into the optical-in of the DSS2.
Your Mic has to be connected with the input of the USB-soundcard. A 3.5mm-cable connected from the USB-soundcard-output to the input of the Mixamp links the Mixamp with the DSS2 with another 3.5mm-cable which is connected from the headphone-output of the Mixamp with the Aux-In of the DSS2.
Now you can control the volume of the Chat-Sound with the Mixamp separate from the volume-control of Game-Sound at the DSS2. btw you don't need an extra Mixamp for that - an 3.5mm-cable with volume-control-unit solves it for less money.

Hope my English is not that bad.
