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I'm using Plasma 5.20, so don't blame me if Plasma 5.21 have this option.

Plasma 5.20 have option to mute microphone by keyboard shortcut, but it's sensitive to add option to toggle microphone mute by keyboard shortcut. Why?

For gaming. Player's need an option to switch microphone activity or to activate it only when key is pressed, for there's no unpleasant cases, whereas other players hear something he/she won't.

I'm using Discord and Steam and set up these settings for all apps I'm using is hard.