I have been using a laptop for awhile and it's been working great. I have been using my pair of headphones for my laptop and they've been working great as well. However, after a bit, I noticed that the audio was not working really good. I thought it was the headphones until I tried more pairs, they did the same thing. The problem is that when I'm listening to a song, one part of the audio I can hear clearly, but the rest (the majority of the song) is either faint or muffled.
I didn't find the right solution from the Internet.