OK TMOBILE NOTE 4 GUYS...this is for TMO N4 im not sure if it will work on other variants, but most likely will. Usually the international version is a bit different. So PLEASE if you try this have a back up of your rom just in case. Someone try this and let me know if and what it works on. You have to manually install this it is not a flashable zip yet...
1. So dl this and RENAME it to mixer_paths.xml.
2. Using root explorer navigate to System/Etc and scroll down to mixer_paths.xml. MOUNT RW..
3. Rename the original by adding ".bak" to the end.
4. Copy the new mixer there.
5. CHANGE permissions to rw r r, same as the rest of the files there.
6. Reboot.
Please let me know which variant it works for so i can add this accordingly and hopefully shorten my to do list. thanks
https://www.dropbox.com/s/y34nbpw0m18z3wb/FinalN4LoudSurroundmixer_paths.xml?dl=0