S4 SOUND BOOST i9506 Model 6.x

Can someone help me with this i just wone incrase a sound little bit im watching movies on showbox but they have poor audio also headphones sound poor im on 6.0.1 port of s5 working well i can change rom no problem :) please help
And please dont move my tread to some other than is dead thanks!

[Request] [i9506] Note 3 camera for marshmellow fully working

i need a fully working note 3 camera for marshmallow with slow motion, surround shot, UHD ....and all the other great features we used to enjoy on lollipop since it is the cam with best quality and compatibility
if it doesn't exist yet, please suggest some good replacements as i'm using a ported S7E ROM which basically uses the S7E camera (not fully compatible with our i9506 and quality is not that good )
Here are some of the apps i found compatible with marshmallow (note4 and s6 cam) but they lack a lot of features unfortunately... it would be great if any one could check them maybe he can add the missing mods : https://mega.nz/#!GUlkUJQK!XEZFIFTd3...2Tj9j3dvLbsKQ4

Anyone can port slim6 alpha 0.5 for i9506?

Please someone that knows how to port as i have failed doing it because c++ 2015 is not installling.,..

Help With DOWNGRADING MY i9506

HI i have recently bought i9506 4.3 Andorid Version and i updated it to 5.0.1 i thinked it will be fast as it is on 4.3 :fingers-crossed: but it lagged so much and i didnt like it :( and i have found this tutorial '' https://www.youtube.com/watch?v=H0h-PVLgPrQ ''
I didnt tryed anything i just wone be sure cuz i have only money to purchase this device and no more (had to sell my s3)
I like old samsung skin :D
Or u can suggest me some optimized and stable LP rom (S7 port is good but) :cyclops:

Just help me and i remove tread im new here newbie :laugh: