固件升级提醒：
1.解压文件，将ECHOXX.IMG文件拷入ECHO本机内存根目录，安全退出设备；
2.如机器有插TF卡，请先将TF卡取出，重启自动升级；
Firmware Upgrade Reminder:  
1. Unzip the file and copy the ECHOXX.IMG file to the root directory of the ECHO's internal memory. Safely eject the device and restart it to begin the automatic upgrade.  
2. If you encounter any issues, please feel free to contact us. 

----ECHO V1.9.0-----
1.优化歌曲ID3信息显示
2.其它系统优化
1. Optimized the display of ID3 tags.
2. Other system optimizations.

----ECHO V1.8.0-----
1.修复OGG格式在切换上一曲时会提示不支持的问题
2.修复部分APE格式ID3信息不显示的问题
3.修复WMA格式ID3信息不显示的问题
4.修复部分MP3格式封面不显示的问题
5.其他系统优化
1. Fixed an issue where switching to the previous track would trigger an "unsupported format" error for OGG files.
2. Fixed an issue where ID3 tags were not displayed for some APE files.
3. Fixed an issue where ID3 tags were not displayed for WMA files.
4. Fixed an issue where album art was not displayed for some MP3 files.
5. Other system optimizations.

----ECHO V1.7.0-----
1.新增按键模式C模式
2.修复部分flac格式歌曲ID3信息不显示的问题
3.优化上一曲切曲逻辑
4.优化更新媒体库加载速度
5.其它系统优化
注：
C模式：单击/双击上下曲键调节音量，长按上下曲键切曲
上一曲切曲逻辑：在当前曲目播放到3S以内时，点击上一曲会跳转到当前曲目的上一曲并开始播放；而当曲目播放超出3S后，点击上一曲则会跳转到当前曲目的0S开始重新播放。
1. Added new Button C Mode.
2. Fixed an issue where ID3 tags for some FLAC format songs were not displayed.
3. Optimized the previous track switching logic.
4. Optimized the media library loading speed.
4. Other system optimizations.
Note:
Button C Mode: Single press/Double press the Previous/Next track button to adjust volume; long press the Previous/Next track button to switch songs.
Previous track switching logic: When the current track has played for less than 3 seconds, switching to previous track will skip to the actual previous track and start playback; 
when the current track has played for more than 3 seconds, switching to previous track will restart the current track from the beginning (0:00).

----ECHO V1.6.0-----
1.修复M4A格式专辑排序错乱的问题
2.修复个别情况下进入我喜欢会出现卡死的问题
3.修复部分TF卡更新媒体库不成功的问题
4.其它系统优化
1. Fixed the issue of incorrect album sorting for m4a format.
2. Fixed an issue where the device would occasionally freeze when accessing Favorites.
3. Fixed an issue where Media Library could not be updated on some micro-SD cards.
4. Other system optimizations.

----ECHO V1.5.0-----
1.新增短控切曲按键模式
2.修复在”我喜欢“里播放时不能记忆续播的问题
3.优化专辑排序逻辑
4.优化电子书书签记忆功能
5.其它系统优化
注：
专辑排序：新增CD号排序，排序逻辑顺序为CD号--音轨号--文件名。
电子书记忆功能：新增电子书独立记忆功能，最多可记忆9本。
1. Added new button mode for track control.
2. Fixed an issue where playback position was not remembered when playing from Favorites.
3. Optimized album sorting logic.
4. Optimized e-book bookmark memory function.
5. Other system optimizations.
Notes: 
Album sorting: Added CD number sorting. The sorting priority is: CD number—Track number—File name.
E-book memory function: Added independent memory for e-book, supporting up to 9 books.

----ECHO V1.3.0-----
1.新增DSD格式的ID3信息显示
2.修复有概率出现更新媒体库会清空“我喜欢”的问题
3.修复有概率出现电子书不记忆的问题
4.其它系统优化
1. Added support for displaying ID3 tags for DSD format.
2. Fixed an issue where updating the Media Library would accidentally clear Favorites.
3. Fixed an issue where the e-book might fail to remember the reading position.
4. Other system optimizations.

----ECHO V1.2.0-----
1.修复在按键B模式且熄屏状态下调节音量是按键A模式的问题。
2.优化律动风格的显示效果。
3.优化第4、5级音量顺滑度。
4.其他系统优化。
----ECHO V1.2.0-----
1. Fixed an issue where adjusting the volume in button B mode and screen-off state would incorrectly operate as button A mode.
2. Optimized the display effect of the rhythm style.
3. Optimized the smoothness of level-4 and level-5 volume.
4. Other system optimizations.





