Just the other day I discovered what a big research field, Music Information Retrieval, this is.

Here is the video archive of a recent conference on the topic.

https://ismir2019.ewi.tudelft.nl/

There are some FOSS applications e.g. https://www.sonicvisualiser.org/ but I'm surprised how bad the results of the analysis are. Intuitively, it seems such a simple problem.