So, whenever I play music from my phone or a video on youtube there is this constant static noise in the background. I can still hear the sound perfectly fine but there is this slight buzz in the background. I noticed that when I listen to music or a video on my PC with the same headphones the buzz is gone. The headphones I have are Sennheiser CX300II so they aren't that expensive but I've encountered this problem with a lot of other headphones so I think it's my phone. I'm currently using CM13.0 but I have had this problem on all the previous versions as well. As I said I can still listen to music but the buzz in the background is just annoying, any help/info as to how to solve this (or not if it can't be) will be greatly appreciated!