Do you have any suggestions regarding those apps you mentioned.
I do have alucard installed and i'm going to play with stweak.
Those are the 2 settings in sTweaks that you need to increase to get better Audio (if it's headphones that you are using)
I'm a DJ too & this is what worked for me to listen to high quality tracks on good ear/head phones
PS: Don't go beyond 47 unless you want to blow your eardrums off !
Any app can only modify the frequencies but at the cost of Gain (the net output volume)
This is your true Gain amplification - after this is done you can use any EQ app that makes you happy (btw an app named Audio FX is already pre-installed in the Rom :good