In the top right corner of the DJI Go4 app, click on the settings dots, then go to the bottom of the list and hit those dots. There's an option to record audio with video cache. Turn that on.
In the top right corner of the DJI Go4 app, click on the settings dots, then go to the bottom of the list and hit those dots. There's an option to record audio with video cache. Turn that on.