I do not have a clear understanding of what the bug is. MQA has the DX220 and the software and it was validated with them but if an issue we can work on it.
edit: I see the upper khz is not showing correctly.
Can you send the file (song) to us and we can see what is happening? You can send it to
service@ibasso.com and
paul@ibasso.com .
@Paul - iBasso, let me try to simplify the explanation.
There's a bug, in Mango Andro.
flac song 16 bit / 44.1 kHz show as it is MQA
(16/44.1 is not MQA song, CMIIW).
The MQA Bug only happened after we play Real MQA song (24/192, 24/172 etc). the illustration as following :
track 1 ; MQA Song (24/192)
track 2 ; not MQA Song (16/44.1) , but show as if MQA.
WHILE...
if the same flac song (16/44.1) is play, and before the song is just a regular flac song (16/44.1), No MQA sign is show.
So if I send u the flac song that suspected MQA BUG, u will receive a regular, working Flac song...
No used...
Just asked ur team to try the sequence, play MQA song (24/192), then on the next list is regular Flac song (16/44.1), the bug MQA will show...
I can repeatly make the bug showed by doing this.

pic, above is other flac song 16/44.1.
so its a bug...
if still want me to send the file. I will send it.