I post the mod over here as well,
So as we know that our phone only has one output speaker, the one at the bottom,
This mod will allow us to use our earpiece (the one we use for phone call) to act as secondary output speaker . A.k.a Dual Mono or Pseudo Stereo
Simply flash one of the zip attached.
One with original volume level. Another one with volume boost for both speakers.
All original works are based on mod by @MichaelGroth
All zip have backup feature enabled.
But in case you want to revert manually to original config,
Simply download the original_mixer_paths.xml rename it to mixer_paths.xml
And place it in your /system/etc folder and change permission to 644
NOTE : This Mod need ROOT. So for now, i guess only EXYNOS devices can use this.