Just like two other people reported here on the forum, the same happened to me. My headset microphone was working fine, but when I closed the fx sound app, it stopped working. I tried all possible settings and couldn’t revive it, what a shame. I tested the same headset on another device, and it showed no sign of life. Now I will have to spend money on a new headset, thanks to the creators of this app. Let this be a warning for you to stop using it before you end up with a loss.