How are audio file sizes calculated??

I’ve just started trying to optimize a project that had apparently large audio files

I’m not an audio pro but I can understand that lowering a quality related number should generally reduce the file size, I used audacity to perform some exports and test the file sizes, however :


(forgot to say that changing the bit depth doesn’t change anything either)

Also, comparing to the original file sizes, the order is completely different


(this order makes much more sense actually)

I might be missing something here, but I still think that it’s really hard to work with, the music in the project I’m working on take 20%+ of the download size for random reasons :person_shrugging:

NOTE: The docs doesn’t help much either

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Uh, how is this an issue ? I believe there’s just some hidden things that we don’t have access to and are undocumented that’s all :eyes: