I had a quick poke around to see if it's possible to implement something like audio filtering on Android, and found just about exactly that question asked over

I had a quick poke around to see if it's possible to implement something like audio filtering on Android, and found just about exactly that question asked over at https://stackoverflow.com/questions/15385797/hook-simple-audio-filter-to-music-playing-under-android; https://stackoverflow.com/questions/15385797/hook-simple-aud... TL;DR no, for obvious (albeit annoying) security reasons. I'm not even sure if it would be straightforward with a rooted device either.