SM-10_SoundFirmware_V2.7
Update content:
>>Optimized the variation function for accompaniment.
>>Optimized the smart chord area of accompaniment. Users can customize the accompaniment area, including the start and end notes.
Note: Firmware version V1.1.5 or higher is required.

SM-10_SoundFirmware_V2.7
更新内容：
>>优化伴奏时的变奏功能
>>优化伴奏的智能和弦区域，用户可以自定义伴奏区域，包括起始到结束音符。
注意：需要搭配V1.1.5及以上固件。