How to improve vocals from Blurays ?

[Bsmooth]

Just started getting my blurays discs on a hardrive using MKV and Handbrake. I'm a bit on in years and I guess my hearing isn't what it used to be. I'm finding it a bit difficult hearing vocals from movies after I get the files onto my HD. I'm watching on a pretty old Samsung, but no night settings to play with.
In your experience is there a way to improve settings in Handbrake to improve the vocals a bit? I read you can set the audio Dynamic compression between 1 and 2.5, but not sure where might be the best place.
Its strange If I watch the same movie being broadcast the vocals seem fine, but from a bluray rip they are very quiet.
Also do the audio settings like mixing from say an AC3 to AAC make a difference in vocals as well, lots of options here. Right now I mix them down to stereo, but maybe lose vocals in the process somewhere?.
I also have subtitles on and usually have a few choices including SRT files as well.
Any help would be greatly appreciated.

[johns0]

The only way to to improve audio is with an audio editor such as Audacity.

[Bsmooth]

So you have to run the entire film thru Audacity, minds as well make the movie myself.

[johns0]

Depending on your computer if its fast enough it would only take a few minutes,you don't need to run the movie.

[alex]

You could try this open source software & set the volume manually by listening to the increased volume so as not to gain audio distortion as there is no clipping setting. It's just a quick solution which serves most peoples needs.

https://www.videohelp.com/software/Free-Video-Volume-Booster

[ProWo]

For the audio, specially if you downmix ac3/aac 6 channels to stereo there are special filters to improve the volume of the speech without clipping, in clever FFmpeg-GUI.
If you are interested, I will post a tutorial.