How do you make the music volume louder than the highest volume on the Sony Xperia M2 I recently got a new phone and the music volume continues to decrease so I was wondering if there is a way to make the volume higher than the max volume on the Sony Xperia M2, also I have already put the sound enhancements on so I need a different way.
You can try Volume Booster app which increases maximum volume by 30-40%. 

Alternatively, have a look at the Play Store search query here. There are many other applications in Play Store which would meet your needs.