Ah, I see.  Thanks jamato and everyone who responded, I'll shoot iBasso an e-mail and see what they say.  Still love the DX90 

Is anyone still having the fade out and then fade back in problem?  On occasion, at random during playback, the sound will completely fade out into silence, then fade back in after a couple of seconds.  I have had this problem since I've owned the device (1st batch), and it has persisted through...

Appreciate all the work so far!  Just a heads up -- the settings still reset on my DX90 as well.

  Working now, thanks!  

Loving the Rockbox port so far, and really appreciate all the work that's gone in to make it work on the DX90!     Just had a question about how to get external playlists working -- I can't get the M3U playlists that I've thrown on there to load the songs.  I think the problem is with how I am...

  My card is formatted in exFAT.  I have nothing on my card but directories full of a mixture of MP3 and FLAC.  I'll try reformatting my card too and see if it helps... 

  I also experience this issue.  The sound will randomly fade out for a couple of seconds in the middle of a song, then fade back in.  I am using the SanDisk Ultra 64 GB for my micro SD card.

I just recently received my DX90.  Coming from a J3, which was alright, but this DAP is on a whole other level.  I'm loving the detail of the sound!  I didn't own a DX50, so I just had a couple of questions on the usability of the DX90 that I can't seem to find the answers to.   1) Is there...