This is one of my favorite music equalizer and enhancer. Has multi function and increase sound volume as well the quality of sounds.
Custom Recovery (TWRP,CTR.Philz,CWM)
First make sure your phone is rooted and has custom recovery.
Download Dolby_Atmos.zip and place in your sdcard.
Go to recovery (ex. TWRP)
Then Locate Dolby_Atmos.zip and install via zip.
Reboot! and Enjoy!