[Q] extracting audio from android game or recording it somehow possible?

I just finished Final fantasy 4 (android), and I wanted to have the remastered soundtracks from it. But on the internet the remastered version is not available yet, I could only find the old soundtracks.

I tried screencast recorder, z screen recorder etc(to record video+audio then extract audio), but they all record audio from the microphone, so that didn't work out.

So is there a way to extract the audio from the game somehow, or some on screen audio recorder for android devices?

thanks :)