I noticed that as well...
I tried both versions, the first one has the issue with the front speaker being too loud.
The higher version makes everything too loud, but both versions have some type of hiss, white static noise. Unfortunately I am not sure how to describe the noise I heard. It's more noticed on the higher version, but it's available in the normal one as well and kinda annoying.
I thought it was something related to my phone being too old, some hardware issue, so I installed the original rom and the sound works pretty nicely. No need to use this fix, but when you switch to another custom rom this happens. This user "fix" was the best one I've found around the internet, others didn't work or have had more issues.