Huawei's HarmonyOS system application has a sound in the split screen.

According to Huawei's official documents, in split-screen mode, if both applications have audio output, the sounds of the two applications will be played at the same time and cannot be distinguished or controlled independently. If there is no special setting, in this case, the sounds of the two applications will overlap and interfere with each other. In order to avoid this situation, adjustments can be made in the following ways:

1. Turn off the sound of one of the applications: When displaying in split screen, press and hold the volume key of one of the applications or enter its setting interface to turn off or reduce the sound to a minimum.

2. Select to play only the sound of one application: When displaying in split screen, click the "Application Sound" option on the top title bar of an application or the setting interface to set the sound output of the application as "Play only the current application".

3. Independent output through headphones or external audio: In split-screen display, by connecting headphones or other external audio devices, independent control of audio output of different applications can be realized, and the problem of overlapping sounds can be avoided.