Enumerate APOs (FxProperties) on AudioEndpoints

Daniel Beneš 1 Reputation point


Is there any way, how to enumerate registered APOs on AudioEndpoint in C++ or C#?
I know that it's in registry folder FxProperties under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio...

I found only how to enumerate only AudioEndpints or only APOs, but not how to "connect" it together.

Thank you

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  1. Jeanine Zhang-MSFT 8,316 Reputation points Microsoft Vendor


    Welcome to Microsoft Q&A!

    According to your description, whether you want to enumerate the values of FxProperties? If so I suggest you could try to use RegEnumValueA function to enumerates the values for the specified open registry key.

    FxProperties values: The FxProperties registry key holds the system effect APO configuration for a specific audio endpoint device.

    Each audio endpoint device has its own key, named after the endpoint GUID.
    Under each endpoint device key, the FxProperties key contains system effect APO configuration.

    For more details I suggest you could refer to the link: https://github.com/dechamps/APO

    Best Regards,


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