I have a brand new, rooted Moto G with stock Android 4.4.2. Being new to Android, I was looking for a painless way to push music to my phone from various computers. I opted for using BTSync, pointing it to my phone's Music folder (that is /storage/emulated/0/Music).
Now, when I put stuff into a synced folder on my Macbook or my Linux laptop, it automatically gets synced to the phone's Music folder by BTSync. Works like a charm.
The issue is that certain apps on my phone do not 'see' these synced files.
For example, OI File Manager, AntTek Explorer and VLC see them and I can play back all the audio files with VLC.
But Play Music (from Google) or Pimp My Music just show me an empty playlist. Also, when I connect the phone via USB cable and use Android File Transfer on my Macbook, the Music folder is empty, even though the aforementioned file managers, VLC and BTSync show the files as existing and, as I said, VLC can even play them!
What's more, when I launch Play Music directly, e.g. from within OI File Manager, it will play back the resp. selected audio file too.
What am I missing here?