How to update the firmware for DM15 R2R: Click here

Video instruction:

How to update the MCU firmware:

https://youtu.be/DzNdQZgN-yU

How to update the UAC firmware:

https://youtu.be/PM3UrN0HpoY

Updated at 2026-06-23

Changes and improvements in the new firmware are as follows :

1. Added total track duration display for CD discs

2. Added customizable button mapping function

3. Added Japanese language support

4. Optimized other user experiences

1.新增CD碟片曲目总时长显示

2.新增自定义按键功能

3.新增日语

4.优化其他体验

DM15 R2R MCU_V1.47.17 package download link: Click here

Updated at 2026-05-21

Changes and improvements in the new firmware are as follows :

1. Fixed the issue where the battery cannot be charged when the voltage is low or in over-discharge protection.

DM15 R2R MCU_V1.47.06 package download link: Click here

Changes and improvements in the new firmware are as follows :

1. Fixed the issue of probabilistic no output in Desktop Mode.

2. Fixed the issue of probabilistic static noise when BASS switch is enabled.

3. Optimized the BASS usage experience and sound quality.

4. Other performance optimizations.

UAC firmware 0.0.6 package download link: Click here

Updated at 2026-03-19

Changes and improvements in the new firmware are as follows :

1. Fixed the bug in the automatic shutdown logic;

2. Miscellaneous performance improvements.

MCU V1.44 firmware download link: Click here

Updated at 2025-12-30

DM15 R2R MCU firmware V1.39 firmware changes are as follows:

1.Added the display always-on function

2.Optimized the BASS usage experience and sound performance

3.Optimized the screen saver information display function

4.Modified the auto power-off logic

5.Fixed the reverse order bug of the remote control's up/down buttons

6.Other performance optimizations

MCU V1.39 firmware download link: Click here

DM15 UAC firmware change is as follows:

(If you don't have a Windows computer or you don't want to update, just not update this firmware.)

1.Fixed the issue where the automatic power off setting would become invalid when there was no output or operation in USB in mode.

UAC firmware package download link: Click here

FIIO USB DAC driver V5.74.3 version download link: Click here (For Win 10/11, not for Win7/8/XP)