Mute hotkey to microphone?

I started streaming a few days ago.

Unfortunately, the hotkeys go from the livestream program itself, only if the program runs in the foreground.

As soon as I start a game and twitch studio is no longer in the foreground, the hotkeys to mute the microphone also no longer work.

My question now is whether there's any program where you can set hotkeys for your headset or something similar.

Is a bit strange written but I hope that you still know what I mean.

There's OBS Studio you can use it anyway and everything works fine.