Reddit reviews Music Data Analysis: Foundations and Applications (Chapman & Hall/CRC Computer Science & Data Analysis)

I am not the one who downvoted you, but I think I can guess why someone did. You say you want to compare to audio signals and are asking for advice on how to proceed. But obviously there's a bajillion ways that two different sound signals could differ from each other. You're going to need a much clearer idea of what kind of comparison you want to do, i.e., what kind of question you're trying to answer about the signals.

I can recommend this book: https://www.amazon.com/Music-Data-Analysis-Foundations-Applications/dp/1498719562. There, or perhaps elsewhere, you should be able to find helpful perspectives and ideas.