I am a total newbie to this sound world and need some help.
There is a huge audio clip of almost 3 hours (I have attached a part of them) which I wish to make a bit more audible.
Original audio clip is file
aud1 and things which I have tried so far on standard settings are Noise reduction, Declicker, de-esser and vocal isolation.
Still, the resultant is not very good and satisfactory as there are a lot more crackles while the main content is being spoken (no idea what that's called).
Please do help me if you can, as this is my grandfather's birthday present.