Don´t miss what happens around you when you are using your headphones or earphones. With ambient sound you can easily hear just clicking a button, setting the volume and leaving the app running in the background.
It is helpfull for example when you are listening music and walking on the street, or when you want to amplify the distant sounds.
Do not forget to close the app by clicking twice in the back button, otherwise it will continue running in the background.
You can use this app also to record sound using the different microphones of your smartphone
Problems (equalizer, records) with Android 11 fixed