Skills for mastering old music

Question

There is a new store in town that sells old music (1910s and onward), and while I find it enjoyable, the quality is generally poor.

I have long wanted to learn how to work with audio, and this is kind of a good excuse to get into it. As a hobby, I want to work with this old audio to practice working with audio.

I am new to this, so what sets of skills should I work on specifically for this?

Update

The thing I want to begin with is removing noise from the recordings. The kind of noise I am talking about is the same as in, for instance, this collection: https://archive.org/details/BillyJonesErnestHare

Answer 1

Here's a nice video to take a grasp of how remix is done.(If this is a kind of remix you mean) You'll need a lot of knowledge on using specific programs like sequencers and plugins.

If you meant you want to improve the sound quality, then you mean 'remastering', and you can get the idea of it in this video.

Remastering generally requires extremely acute audio hearing skills and expensive machines.