My site has only one page, and users access my uploaded mp3 files from there – can I analyze access by song title?

You can collect class “track-content title” when someone play any of the music using google tag manager.

you can link analytics plugin for precise details.

https://www.lovesdata.com/blog/google-tag-manager-button-click-tracking

You can also add a post-id in each post i.e. music track containers for a better analytics result.

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