I had some music in flac format which I converted to Apple Lossless (m4a) using dBpoweramp on a windows PC. I then copied it to my iTunes music library. The track plays on my PC in itunes, however, when I sync either my iPhone 4 or iPad 2 to the iTunes library the m4a track does not get synced to either of the devices and I get a message saying "the track did not get copied because this iPhone / iPad can not play it." Both devices are updated to iOS 5. Another relevant piece of info is that this is a single track but it is pretty long - about35 mins (750 mb). It's actually the rip of the entire side of a Vinyl record and is unsplit into separate tracks. Would be grateful for any advice.