Some of you asked for Android 8.1 firmware with Mango OS added, but it was not possible: the mode switch was not implemented in Android 8.1 kernel... until yesterday late evening! A New Year surprise from @Paul - iBasso and his team came to me, and, with some additions from myself, now I can share it with you: add-on 1.22b2 for firmware 1.05.075 with Mango OS!
Please note: Mango was taken from DX200, with only functional adaptation, with no changes to UI! In particular, only first 5 digital filters actually work, and their names in Mango settings don't correspond to actual DX150 filter names.
Fantastic job,very thanks