I have noticed when I pay some mp3 files in Poweramp I hear this poppping/cracking distortion sound in the background. The distortion always occurs at the same exact points in the song. I have tried playing these songs on other audio players and they play fine.This occurred first on my Samsung Galaxy S2 and now on my Galaxy S4. I have tweaked with the audio buffer and thread priority, the DVC, and the equalizer settings and nothing has fixed the problem.