It will work with EVERY FIRMWARE/ROM/KERNEL. from 4.2.2 to 4.4, just choose the correct option in Aroma
It's compatible with Viper4android - confirmed.
It was made possible by @SuperHanss . I used this guide to see what needs to be edited. Please thank him, because I wouldn't be able to do this without him.
That's not just copy and paste from another mod, so audio quality remains the same because I just made audio output number different.
Enable "dynamic equaliser" in sound options/equaliser to get the full boost. I found out that if it's disabled, the volume is much lower.
UPDATE 31.05.2014 z1 volume mod 2.5 (latest version)
Fixed headphones in-call and made it an option along with earpiece.
Download - HERE
Added earpiece boost (small speaker used to hear the person in a call) only for android 4.4. I also propably fixed aroma installer this time.
Updated the files with those from .757 FTF to fix the routing issue. (Audio from earpiece instead of from the speaker)
UPDATE 05.04.2014 Latest version - Z1 headphones volume mod 2.2 JB&KK AROMA.zip
Added speaker boost for all roms!
DEAF volume works great on 4.4! It's terribly loud!
Please report any issues!
I know that speaker is a bit distorted at the highest volume, I decided to leave it that way because some tracks are recorded quieter than others.
If the aroma installer wont work for you then unpack the zip, open aroma, choose your android version, choose whether you want headphones or headphones+speaker boost, choose the volume boost of your choice, go to the etc folder in there and move mixer_paths.xml file from there to /system/etc, change mixer_paths.xml permissions to those of other file in that directory and then reboot and it'll work. Currently this issue occurs only on the monx's rom.
Of course you will be able to choose any of those volumes independently.
Boost for more devices (all android volume boost is my target)
There might be a problem with the mod. It fails to extract files on some roms and recoveries, no idea why. If you don't hear any change in volume then do this.
1. extract the latest zip
2. Choose your android and desired boost
3. copy mixer_paths.xml of your choice and paste it into /system/etc
4. Fix permissions in recovery or correct them by yourself (they should be set the same as other files in /system/etc
If you want to help me with fixing aroma installer, then please do this, I'll add you to the credits with a link with to post with your fix so people could "thank you" in that post.
Boost is tested with:
DON'T DOWNLOAD VERSIONS FROM ATTACHMENTS ANYMORE!