title: Redirect audio output on Android
body: <p>on Samsung Galaxy S8 with Andtoid Oreo there is an equalizer, that gets applied on all media output (not sure about other outputs like calls, I need just media).</p>
  
  <p>I am currently writing a music player in Java and I would like to know, whether it is possible to redirect all media output into an app to process the sound like the EQ on S8 does.</p>
  
  <p>Edit: The actual question is how to do it and if I need a superuser (root) for that. From which Android version is this possible?</p>