Not Getting Sound From Minecraft!

Hello Friends,

I am having a serious issue while playing Minecraft. I am not getting any sound during playing this game. And strange when I plug in headphones, the sound is detecting. Can anyone suggest what to do? Any help would be greatly appreciated.

 

[HalHickle]

Anyway guys, I have been able to solve the issue by following the steps here. Not sure it will work permanently or not, but it works now. Thank you,