I heard that the Sony music app is the only app with access to the full DAC - can anyone confirm this? I have a call scheduled with a Sony person this am and will ask specifically - but I expect the answer that all other apps are relegated to non hirez
I have heard the same thing multiple times from multiple sources. Although, I don't know that any of them have been first-hand from Sony.
As for your playlist woes, I noticed the same issue you're experiencing.
There's only one "work around" that I'm aware of, if you want to call it that.
If you use Media Go and have your playlists in there, you can transfer them over to the ZX2. If you're sending a copy of a playlist to the main storage, and that playlist contains, oh, lets say 200 tracks that you have on the SD card, then what Media Go will do is copy over those 200 tracks to your main storage.
The upside is your playlist will now work properly. The downside is that you will now have duplicate tracks on the ZX2. It will eat up more storage space, and the database on the ZX2 will show you both copies. In such a case, if you wanted to play back a single album, and that album happens to have two copies of every song, you will hear each track twice when you play it back.
I could consider myself "fortunate" in that I only have a few gigabytes worth of tracks that are duplicated. So I manually went through and removed the "duplicate" files from my SD card.