How to get access to secret Windows APIs?

Question

Dear HackerNews,I would like to implement my own virtual surround sound provider akin to "Windows Sonic for Headphones" and "Dolby Atmos for Headphones". As far as I can see, there's absolutely no public API doc about that feature.How would you approach analyzing / reverse engineering Windows to get access to the provider-side API?Given that Windows usually uses COM objects, I'd guess that once you have the correct binary file, creating a reliably working interface specification should be easy.

fxtentacle · Accepted Answer

This is the consumer-side API: https://docs.microsoft.com/en-us/windows/win32/coreaudio/ren... I'm trying to implement the provider side, i.e. the thing that creates COM objects for ISpatialAudioClient to work with.