Volume Normalization Android?

Hello,

Using Kodi on a Shield and was curious what others are using for volume normalization for videos with differing volumes? I have tried the method described here: https://www.reddit.com/r/kodi/comments/4…o_in_kodi/ but it seems to produce a lot of background white noise to the detriment of other audio (actors talking, etc.).

Does anyone have a method or app for normalization?

Thanks,
Mark