Want to experiment with music? Teach the Physics of sound? Take a look at Chrome Music Lab. Freely available via https://musiclab.chromeexperiments.com/ there are a number of tools there to help teach everything from rhythm to oscillation to soundwaves to spectograms and much more besides.
As you can see from the above screenshot, the idea is to help make music a bit more accessible.
One tool measures the strength of your voice. One story I read via the Google Educators group is simply brilliant. A support teacher has been using the spectogram with a child to help measure the strength of their voice. Fantastic.
Have a look (and a play) for yourself. It’s brilliant. I cannot however help how much time you may spend there looking at the great tools that come with the music lab.