I've had it for over a year, and at the beginning it was fine- there was nothing bothering me. Now, there are some problems with the audio. Sometimes it will be so soft that I can barely hear anything coming out of the TV, and other times it starts blasting music out of nowhere (because I turn the volume to 100). I've tried looking online for any similar cases, but so far my search has been unsuccessful.

There's nothing wrong with the TV, since when I watch TV shows and such, everything is fine. Could it have something to do with the cords?

I know that the "details" I've provided are pretty vague, if you have any suggestions as to what I could try to fix this problem, it would be appreciated very much.