How to update the firmware of M21: Click here

Updated at 2025-06-05

M21 FW1.0.1 firmware changes are as follows:

1. Added remote control functionality.

2. Added multiple new preset wallpapers.

3. Added quick access to Cassette Mode (Accessible via the Cassette Mode icon on the desktop/dropdown menu/multifunction button).

4. Added adjustable output volume for system USB (Enabled by default, go to Settings > Audio to adjust it).

5. Added automatic cassette case detection to prevent accidental Cassette Mode activation (Enabled by default, go to Settings > General to adjust it).

6. Added multifunction button support for entering the Cassette Mode/calling up the dropdown menu (Go to Settings > General > Multifunction Options to adjust it).

7. Added "Use cover image in the same folder" option (When enabled, if a song has no embedded cover, the first image in the same folder will be used as the cover. Go to Settings in FiiO Music to enable or disable it).

8. Added lock screen cover art display in FiiO Music

9. Fixed the issue where some chargers failed to charge or trigger Super High Gain Mode.

10. Fixed the issue where audio may be abnormal in Bluetooth transmitting and receiving.

11. Fixed the issue where desktop folders could not be renamed.

12. Fixed the issue where the play/pause button lock function would fail after sleep mode.

13. Fixed the issue where songs on certain NAS servers using WebDAV protocol would fail to play.

14. Improved some UI display effects.

15. Miscellaneous performance improvements and bug fixes.

1.新增远程控制功能

2.新增多套预设壁纸

3.新增磁带模式快捷入口

（可从桌面磁带模式图标/下拉菜单/多功能键进入）

4.新增系统USB输出音量可调功能（可前往设置-音频选项下设置，默认开启）

5.新增磁带壳自动检测功能，防止磁带模式误检测开启

（可前往设置-通用选项下设置，默认开启）

6.新增多功能键进入磁带模式/唤出下拉菜单功能

（可前往设置-通用-多功能选项下设置）

7.新增同文件夹任意名称封面选项

（开启后，当歌曲无封面时，将使用同文件夹下第一张图片作为歌曲封面，可前往飞傲音乐设置下选择开启或关闭）

8.新增飞傲音乐锁屏封面显示

9.修复部分充电器无法充电或无法触发大耳模式问题

10.修复蓝牙发射/接收几率性出现声音异常问题

11.修复桌面文件夹无法重命名问题

12.修复休眠后播放/暂停键锁定失效的问题

13.修复部分NAS服务器WebDAV协议下歌曲无法播放问题

14.优化部分UI显示效果

15.其他性能优化及Bug修复

M21 FW1.0.1 firmware download link

Incremental firmware package:

m21pack.fiio.net/1.0.0/M21-ota-1.0.1.zip

Full firmware package:

m21pack.fiio.net/beta/M21-update-1.0.1.zip