Musimathics is great [1]. If you want a more interactive source you can play with python notebooks from the music information retrieval site [2]. I've found it

Musimathics is great [1]. If you want a more interactive source you can play with python notebooks from the music information retrieval site [2]. I've found it helpful, as you try some of the described music theory concepts in a programming environment. Shameless plug, I've also written about how audio fingerprinting works [3], which touches on some of the topics regarding music theory. [1] http://www.musimathics.com http://www.musimathics.com [2] https://musicinformationretrieval.com https://musicinformationretrieval.com [3] https://emysound.com/blog/open-source/2020/06/12/how-audio-fingerprinting-works.html https://emysound.com/blog/open-source/2020/06/12/how-audio-f...