I have my push to talk set to "T" but when I press it nothing happens...I talk in the mic and there's no indication that m mic is registering. However every other program like discord and blizzard chat is picking up my mic just fine...
What system are you running?
I often find that when I install a new game, Windows 10 (PC) will default Not Allow the new program to use the microphone. I don't know why.
Go to Start , then select Settings > Privacy
Left Click on "Microphone"
Set Anthem to be allowed to use the microphone.
I don't know why this happens but it does.
I also open up the Sound Settings to ensure that my device is chosen...NOT the Default Sound.
Go to Start, then Settings > System
Left click on the "Sound"
Ensure that both the "Output devices" and the "Input device" are both set to your Headphones/Speakers & Microphone. (I use a headset so both are set to use it).