Thank you. This solution worked on an Asus TF700 Infinity Tab, android 4.2.1, running a Yamaha AV Controller App. I don't think the Yamaha App is the problem. I think the problem has to do with Google Play trying to sync my mp3s to their cloud then Yamaha thinks I have two of each song installed. I've disabled Google audio syncing but its come back. I've ripped all my CDs to high res mp3s and then I stream them digitally to a Yamaha RX-A830 receiver. Best sound ever until android duplicates all the entries and then every application plays each song twice in-a-row. Ive been living with this for a while waiting for google to fix their end then Asus must sending an update to my tablet. Not holding my breath. Too bad somebody broke it to begin with. Maybe Google's smart enough to figure it out and come up with a patch. At least now before playing my tunes I can delete media, and reboot, and it will work for a while. Maybe until the next Google Play update?
Thanks again.