I’ve bought a SansaDisk Clip Jam.
It’s a neat piece of kit but it doesn’t seem to play aac/m4a files.
Will Sansa be able to fix this with a firmware update?
These files played OK on my iPod Shuffle before it shuffled off this mortal coil.
It could be that the Clip Jam is just too picky about which types of aac/m4a files it can and can’t play.
I will provide a sample non-playing aac/m4a file if you need it.