Galaxy S5 :: Distorted Sound Coming From Phone When Playing Music?

Whenever I play music through my phone, with or without headphones, there is a sporadic noise that sounds similar to a record skipping, but more distorted. It is not the two tone beep others have posted about, nor is it the usual problem with headphones. The sound occurs in multiple audio apps. The default music player worked fine up until about a week ago (maybe two?), then the noise started. At first, a secondary app worked fine, but today that started making the noise as well. Force quitting the default app worked for a while, stopping the noise when I started the app back up, but now it goes back to the noise almost immediately. What this noise is or how to stop it permanently?