Ok. ive tried to get my mic working using various methods on this forum ( voice loopback etc.) but when i loopback it just shows my name flickering on and off... I use voice record and my name just flashes all the time can someone help?

run the valve voice setup tool

i have and it sounds fine but when i go into a game of ns and use voice loopback i can see that my name keeps blinking, so i changed my voice button and it still blinks please help meh