[Q] Why There's High Pitched Screeching Noise in my Galaxy Note GT-N7000?

Hello there Android Central.
First I would like to apologize if this has already been answered. but i didn't find it!
So I have a Samsung GT-N7000 Galaxy Note Rooted running the ICS 4.0.4 .

I just came to know high pitched screeching coming through my speakers when i play anything (Video,Music even during calls),
I thought that it's speaker's fault, I Plugged in Earphones, they also produced the same noise.
In Normal Carrier Call Everything goes fine,But When I do Skype or Viber, I hear that Screeching Noise..
IN SHORT: My Note's Sound system gone mad ..

This Problem occurred when i upgraded my GT-N7000 from ICS to 4.1.2 JB..
I thought it'd be a OS issue so i downgrade to ICS.
But problem remains there..

Help Me!!!