It should mute ROBLOX. Not the whole computer sound.
I do NOT know if there is already one. Tell me and where part of the screen the mute button is on.
i.e Upper right.
Go find the volume controller in the lower right corner of the screen. Right-click it and open the master controls. You can toggle application sounds on/off form there.
If you mean to shut someone up.
Say I spam in game.
wkfjhwg
wet
hw
thj
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If you mean to mute that person from talking in the game, yes, That would be awesome to get that update back, but we don't have it. If you mean it that way, I totally agree!