Kraken x not working the way i want on pc.

Just bought the kraken x and plugged the 2 jacks in the front of my pc. I have the pc sounds coming through my kraken but want the sounds coming through my pc speakers as I only want discord coming through my headset. also the mic is very low volume, when I use the test mic function it barely moves when speaking, and people on discord have told me they can barely hear me. I previously had a elekra v2 usb which did all these functions no problem.