Thank you for taking the time to post this @Franks_Gone_Mad
I was experiencing an issue due to having my headset plugged into my Xbox controller., where the sound would be choppy and cut out every other second. When playing through speakers, no issue. For me, Plugging headset directing into PC is not an option, it has to be connected via xbox controller. I just discovered a work around for anyone else with a similar setup.
If you go into control panel,
click on sounds,
go to the recording tab, right click, make sure "show disable devices is selected.
Right click on stero mix >
properties, and go to the listening tab,
check “listen to this device” and then
from the drop down menu for "playback through this device "select your headset.
This will force the sound from your speakers to play through your headset at the same time. So now sound is playing through speakers and headset at the same time, but it will be crispy and clear and the game will actually be playable. The only thing with this method is you have to phyiscally turn your speaker sound off unless you want sound playing from both at the same time which idk why you would, (speaker sound still needs to be on within volume mixer otherwise it will not work). Hope this helps anyone having the same issue