How do I fix M4A's (AAC's) for Sansa Clip Sport? 2015-08-23 20:09:07 So I have a Sansa Clip Sport that supposedly can play AAC files but when I put M4A's onto it, they just play for about 2 seconds and then skip or, they don't play at all. I have done some reading that says that the internal formate of those MP4's might not be standard. Is there a way I can fix them so that they will play? They play fine on my computer in Foobar2000 and Audacious and DeadBeef. Thanks in advance. I did update the firmware recently too.