I have a few ALAC downloads here that are wonderful...listening with Mojo and Beyerdynamic T1 or T8ie. I am using iTunes for the downloads. There is another alternative: ALAC HD for a few dollars more. I cannot find any info on the difference between ALAC and ALAC HD... Is there a significant difference? Thanks! Link: http://live.brucespringsteen.net/live-music/0,14781/Bruce-Springsteen---The-E-Street-Band-mp3-flac-download-9-7-2016-Citizens-Bank-Park-Philadelphia--PA.html The choices are given in the drop down menu and pricing....is ALAC HD better than ALAC?