Sudden audio bug in apex legends

I could play apex legends for 2 days without any problem. But after that,this audio bug comes in which is affecting my gameplay majorly. 

I can't hear the announcer's sound effects or I can't even hear what mine or other's legends say. I can't hear the quips of legends in the main menu. I had to turn on subtitles to hear what my legend say. 

I can't hear the voice chat from my teammates too. 

I don't know how it came. I could play properly for 2 days. But after that this bug came. 

Please tell me how to fix this. This is annoying me and I can't enjoy the game.