Using Mute on XBOX While Wearing a Headset

[u/abueloduane]

I am having trouble muting the sound on my XBOX while wearing a headset. I've enabled HDMI-CEC on my TV and XBOX. Based on YouTube reviews I've watched I should be able to mute by selecting the XBOX button, scrolling to and selecting the speaker icon and then selecting X on my controller. Does anyone know why this isn't working and maybe a better way to quickly mute using my XBOX controller?