Razer Kraken X Not Detected

Hi,

I bought a Razer Kraken X but when I plug it in, my computer doesn't respond or recognise any changes to I/O devices.

I'm using the input/output splitter cable. I've also tried plugging the cable directly into the audio output of my computer without the splitter cable.

Nothing new appears in the Device Manager under audio input/output devices. Nothing appears under Playback Devices or Recording devices under the Windows Sound settings (I made sure that show disabled devices is enabled). Nothing appears in Sound Settings either. Nothing appears in Synapse under devices.

I've tried restarting, uninstalling my existing audio devices and restarting, checking for Synapse updates, re-installing the older version of Synapse. I tried using the Kraken X on a laptop and it worked although playback happened through an existing RealTek audio output device and no new devices appeared in Windows (I guess some kind of manager because it's a laptop). I don't really know what else I can try.

I have a USB headset that works, and I have some speakers that use a USB and audio output cable (plugged into the same audio output socket as the Kraken headset) and these work fine.