Adjust the audio balance in settings. 65 System sounds / 35 microphone is perfect for me.

Ok I figured this out finally.

Everyone who has played arma series games knows you have to use shift and ctrl for various reasons in the game.

Holding shift or ctrl cancels the mic rec button in Action! even if it is a key that should not be affected by shift or ctrl. Yes, even mouse buttons.

Record on button down option is not working correctly atm. Sometimes nothing is recorded and sometimes is even when button is not down. The way I understand it should work is when I press the button - microphone audio gets recorded, right? This is really the only option for me as I want to use the s...

Something close to it. I have O-key set up as record microphone key. O is also show clock key in arma3. So every time you see clock on the video you should hear my voice and only then.

https://www.youtube.com/watch?v=ZATNb7XjCec

How hard can it be? Fraps can do it right. Why can't action!?