High pitched whine

Ok I purchased an M6 a couple weeks ago from JTC, wanted to get one before they make the battery smaller, overall I’m fairly satisfied, even though it lacks the ability to sort by genre. However I’ve noticed what is in my opinion a serious problem, at the end of some tracks it makes a high pitched electronic whine, sometimes it is barely audible, sometimes loud enough to be harsh on the ears. These sounds are not heard on any of my other devices so I believe it is not the mp3 itself. I’ve tried erasing them off the Meizu and putting them back on; this doesn’t seem to help at all. Any ideas or advice would be appreciated.

This is a known problem. No current fixes just yet.