If anyone uses Plex and PlexSync (plex.tv), it works great with the ZX1.
I've a 2013 and 2104 album sync setup on Plex and it syncs the flac unaltered to the ZX1.
Once synced, update the local music app on the ZX1 and it picks up all of the synced albums, including their tags and covers etc.
If you buy any albums and add to your album folder (mine is on a NAS), then Plex automatically syncs the new 2013/2104 albums to the ZX1.
Working well for me at the moment, so thought I'd share Edited by mannp - 5/18/14 at 3:21am