Hi,
If your headphone is connected via USB, it means that it uses its own DSP, so it is normal that you do not see your headphone in Sonic Studio II app (Only Sonic Studio III app via the
Sonic Studio Link feature, can apply the SS3 effects on USB, HDMI, BT audio devices).
So if you want to use your new headphone (HyperX Cloud Revolver S) with Sonic Studio II app, you will need to connect your new headphone via 3.5mm jack.
In order to better understand the solutions available to you, you must take into account these connection diagrams of your old headphones and your new headphones :
HyperX Cloud Revolver : Headphone 3.5mm jack (4 pole) plug > Audio Control Box 3.5mm jack (4 pole) :
- 3.5mm jack (3 pole) stereo plug (green) > PC 3.5mm jack (3 pole) stereo (green)
- 3.5mm jack (3 pole) mic plug (pink) > PC 3.5mm jack (3 pole) mic (pink)

HyperX Cloud Revolver S : Headphone 3.5mm jack (4 pole) plug > USB Audio Control Box 3.5mm jack (4 pole) > PC USB

So in order to connect your new
HyperX Cloud Revolver S headphone via 3.5mm jack, you will need to use your Audio Control Box from your old
HyperX Cloud Revolver headphone if you still have it, otherwise you will need to get 3.5mm jack (
4 pole) to 3.5mm jack (
3 pole) stereo plug (green) & 3.5mm jack (
3 pole) mic plug (pink) splitter adapter (For example :
https://www.amazon.com/dp/B091N52J6L)