> but I do spend a lot of time listening to music. I've spent a lot of money on audio equipment.

This is a great domain to motivate oneself to delve deeper into Mathematics. For example;

1) What parameters do you look at in audio equipment before you buy?

2) Somebody is trying to sell you "Hi-Res" music and equipment; Are they worth the money? Why? Why Not?

All of the above need mathematics to comprehend at even a basic level. There are both complicated objective (physics/mathematics) and subjective (our auditory system) parameters to understand eg. logarithms, harmonic series, frequency modulation, tuning, impedance, human hearing frequency range and sensitivity etc.

Having some mathematical idea of the above not only saves you money but also helps you enjoy music "optimally".

References:

Sound: A Very Short Introduction by Mike Goldsmith (also see his other related book on Waves) - https://global.oup.com/academic/product/sound-9780198708445?...

The Science of Musical Sound by John R. Pierce. An old classic (also checkout his other books on Waves, Signals and Information Theory). They are all written in a semi-technical and clear manner for the general audience. - https://en.wikipedia.org/wiki/John_R._Pierce