[Michael Gogins]

Richard Dobson initiated this but it was not carried through. Provide a set of functions that all interfaces must implement:

interface = QueryInterface(rootInterface, InterfaceId)
AddRef(interface)
Release(interface)

Modeled on COM, but perhaps interface IDs don't need to be UUIDs but just names.

An interesting idea, but I do not understand the types/signatures of these operations.

I am not convinced about the need for it. It might be more trouble than it is worth, an extra layer of complexity for API users, since this is not really a norm we observe across other audio APIs.