MUB5-V1.0C2.hex（出厂固件）（Factory Firmware）

MUB5-V2.6H1.hex
通用版升级固件
发布时间：2026年4月
修改内容：
1. 修改关屏逻辑。                                    
	非自动关屏模式下，按电源键关屏，只能按电源键亮屏，触控、按键、音量不会亮屏。
	自动关屏模式下和原来一样，可自动关屏可手动关屏，关屏后按电源键、触控、按键、音量均可亮屏。	
	增加关屏后自动返回主页并锁定主页，关屏后触控屏幕不会进入设置页面。  
2. 增益改四段。                                 
	原高增益改超高Super(S)增益。
	增加处于正常增益与超高增益的中间档（高增益），以使音量调整更精细。               
3. 锁键模式由两个改为四个：ALL，NO VOL，NO Key，Touch。  
	ALL：全锁。
	NO VOL：不锁音量旋钮。
	NO Key:不锁按键。
	Touch：只锁触控屏幕，音量和按键不锁。
4. 切换增益音量自适应。
	切换增益后自动调整为最接近原来声音响度的音量，以避免突然太大声影响使用体验。
	原来音量0切换后还是音量0。
	如果切换到更高增益后音量1仍比原来声音响度大，会自己把音量调整到0。
5. 增益改为弹出新窗口来四选一切换。
6. 修复菜单"About"内的"Runtime"会随机清零的bug。
7. 修复"Input"选择到”BT“，或“Output"选择到”LO"选项没有自动20S后返回主界面的bug。  
8. 修复LO模式下切换增益有时异常的bug。
9. 在菜单"About"恢复出厂设置不再清零"Runtime"。

MUB5-V2.6H1.hex
Universal Upgrade Firmware
Release Date: April 2026
Changes:
1. Modified screen-off logic.
	In LCD Close-off mode, pressing the power button to turn off the screen and can only be turned back on by pressing the power button; touch, buttons, and volume will not turn on the screen.
	In LCD Close-30S mode, it remains the same as before: the screen can be turned off automatically or manually, and after the screen is off, it can be turned back on by pressing the power button, touch, buttons, or volume.
	Added automatic return to the main display page and lock on the main page after screen-off; touching the screen after screen-off will no longer enter the settings page.
2. Gain changed to four levels.
	Original high gain changed to Super(S) gain.
	Added an intermediate level (high gain) between normal and super gain to allow for finer volume adjustment.
3. Lock key mode changed from two to four: ALL, NO VOL, NO Key, Touch.
	ALL: Full lock.
	NO VOL: Volume knob not locked.
	NO Key: Buttons not locked.
	Touch: Only touch screen locked; volume and buttons not locked.
4. Volume adaptation when switching gain.
	After switching gain, the volume automatically adjusts to the closest possible loudness to the previous level to avoid sudden loudness affecting the user experience.
	Original volume 0 remains volume 0 after switching.
	If switching to a higher gain results in volume 1 still being louder than the previous loudness, it will automatically adjust the volume to 0.
5. Gain switching changed to a pop-up window with four options.
6. Fixed the bug where "Runtime" in the "About" menu would randomly reset to zero.
7. Fixed the bug where selecting "BT" in "Input" or "LO" in "Output" would not automatically return to the main interface after 20 seconds.
8. Fixed the bug where switching gain in LO mode would sometimes be abnormal.
9. "Recovery" operation in the "About" menu no longer clears "Runtime".

MUB5-V3.3N7A、MUB5-V3.3N7E
基于MUB5-V2.6H1的纯净版固件
发布时间：2026年4月
与MUB5-V2.6H1的差异：
1. 无MUB5-V2.6H1升级的第9项，也就是在菜单"About"恢复出厂设置仍然会清零"Runtime"。
2. 取消了影响音质的"LCD Close"与"Auto off"的功能。菜单里面仍然显示有，但功能会无作用。
3. 这两个固件只是声音风格不同。

MUB5-V3.3N2E, MUB5-V3.3N7A, MUB5-V3.3N7E
Pure Version Firmware Based on MUB5-V2.6H1
Release Date: April 2026
Differences from MUB5-V2.6H1:
1. Does not include item 9 from the MUB5-V2.6H1 upgrade, meaning that performing the "Recovery" operation in the "About" menu will still clear "Runtime".
2. Removed the "LCD Close" and "Auto off" functions that affect sound quality. They still appear in the menu, but the functions will not work.
3. These two firmware versions differ only in sound style.

固件升级方法请参考：MUB5固件升级说明Firmware Upgrade Instructions.pdf文件
Please refer to the firmware upgrade method in the "MUB5 Firmware Upgrade Instructions.pdf" file.
