Id say to use rocket player. (Can easily be searched and downloaded on the market) Rocket player offers advanced features such as a 10-Band Equalizer, clean and fast interface, repeat, shuffle, headset connection settings, replay gain(Prevents songs from unnormalized loud or soft sounds, (Your ears wont start bleeding on some songs that have a higher replay gain value
) and a "prevent distortion" option that keeps the audio played through your device, or headset clear and distortion free at any volume. If you download just the free version of rocket player, you will only have the option to use a 5-Band Equalizer, which isnt bad, but a 10-Band equalizer is much better by comparison. You can get the paid version by searching "Rocket Player Unlocker" on the market, for around .99 cents i believe, or it could be more now, but it isnt too much money though.