How to play audio in mono in Android Pie

How to enable Mono audio

1. To access the Accessibility features on your Android device, open the Settings app 
2. In the Settings app select Accessibility from the list.
   
3. Now scroll down to the Audio & on-screen text section and select Mono audio to set the toggle switch to On.
   

Note: we have written these instructions for devices running the standard version of the Android operating system. You may find some minor presentation differences if the manufacturer has customised the theme.