I cringe everytime I see Amazon and the HD descriptor they borrowed from video and has little to do with audio. That it only relates to regular old redbook cd quality is to me a bit misleading, too. Not that redbook cd is not high enough definition, because it is. I've seen many complaints about app/device combos that can't do the higher resolution files so far, tho. Have you tried asking Amazon for a list of app/device combos that can?