Firestick audio help

I have a 3 monitor setup on my pc and I occasionally use one of the monitors for my Firestick but to be able to hear the Firestick out of the headphone Im wearing for my pc (Razer kraken v3) I have to use a 3.5mm - 3.5mm cable from the monitor into my in line connector on the back of my pc and enable listen to device in settings. This allows me to hear my Firestick and also use my headphones for things like discord and gaming but comes with a very annoying buzzing sound which Ive tried to resolve with new cables but non work. Is there an easier way to get the audio from my monitor to my pc? If not the. Any solutions for the terrible buzzing sound. Any information would be greatly appreciated I have been trying to fox this for a while now.

If understand your request, You have a firestick connected to your monitor using an hdmi port. If not then you should. you can just change inputs from pc to firestick. If you have your firestick connected to your hdmi on your pc, you have your issue. You are creating a sound loop because the sound is coming into your pc through 2 different places. Your pc sound and your firestick sound. However, You will not be able to use your pc on your monitor unless you change your inputs. A simple change in your monitor inputs will change from pc to firestick but not both at the same time. I use my firestick this way with no issues.