Re: Headphone buzzing noise/feedback
What happens when you wiggle the headphone jack?
Also, it doesn't hurt to try another pair of headphones. I once ripped apart my iBook without realizing I just had 3 pairs of bad headphones.
PC: AMD Phenom 9950 2.6ghz Quad Core, ATI Radeon HD 5770, 8gb DDR2 RAM
Phone: Apple iPhone 5s 64gb (jailbroken)
Handheld Games: Nintendo 3DS XL, Tapwave Zodiac 2, GamePark Holdings GP2X F100