升级教程
1.升级前先确认USB驱动是否已安装，没有安装需要前往https://www.fiio.com/Driver_Download下载驱动并安装到电脑。
2.前往官网https://bbs.fiio.com/firmwareDown.do下载需要升级的固件。
3.将文件下载的电脑并解压文件。
4.将电脑USB连接QX13主USB接口并关闭EQ。
5.在解压的文件找到并打开xmos升级工具。
6.识别到连接后点击“Start”开始升级，直到升级进度条跑完即完成升级。

注：如果中途升级失败，拔插USB按照上述操作再升级一遍即可

Update instcution
Video instruction: https://youtu.be/aEOCH4xk4u8
For the XMOS firmware upgrade, please connect to a computer through USB.
1) Before upgrading, please confirm that the USB driver is installed on the computer. If not, download and install it from https://forum.fiio.com/note/showNoteContent.do?id=202105191527366657910&tid=17
2) Download the required firmware from the official website: 
https://forum.fiio.com/firmwareDown.do
3) Download the firmware and unzip it on your computer.
4) Connect the computer’s USB to the main USB port of the QX13, and disable EQ.
5) Open the XMOS upgrade tool from the unzipped files.
6) Once the device is detected, click “Start” to begin the upgrade. Wait until the progress bar completes to finish the upgrade.

Note:
If the upgrade fails or disconnects midway, please reopen the upgrade tool and try again.