as far I know, the only way you could do it, is with rockbox, but this device doesn't have it.

I only recently found this thread , and wanted to write that the xduoo x3ii is an incredible dap , far cry better than the original X3 , and I'm very happy with this purchase. Sadly rockbox is still somewhat not complete , it works perfectly but some applications are not running properly or...

Exactly , this is the only case scenario DSD has a chance , but nobody except studios that are devoted to it master from vinyl , everything Is DDD today.

DSD is pointless , not only you can't edit it, you can't even play it without a proper equipment , higher than 16/44 gains no better quality , what is important , is the mastering of the digital track. I can't understand why people use 96khz , 24 bit has a better noise floor but it is still not...

this device is truly amazing, small like the sansa yet 4x times powerful and better. Truly a great product , I wanted to buy the M3K but then I found this :) .

2.0 is the latest version for fiio x3ii and the last one as well 

here are images of the device , maybe it will help you   https://www.rockbox.org/wiki/FiioX3Gen2

I resample most of my songs to 16/44.1 , sounds the same to be honest , I checked using Dr score plugin for foobar2000 and it is indeed the same only ~0.01 difference in the dynamic range

       Thank you guys for the help I'll try that 

Beautiful Dap :)

    I have sandisk ultra 128 fat 32 , 4 kib cluster , I know how to update it just shows me version too low , It came on version 1.6 when I got it.

 I tried downgrading from the latest version and 1.6 and the beta 1.44 and still same issue 

How can you downgrade to version 1.4?    To me it says version too old?    I tried the beta version above the version 1.4 and it did work but below it nope.     What can I do?    Thanks

 got it from ebay :) 

 cool case , I don't like those flip cases , thanks anyways.