Is DirectSound and WinMM based on WASAPI?

Question

I saw in this slides that the winmm and directsound in vista is based on wasapi.

Does it means that winmm and directsound actually do their work by calling the functions in WASAPI ?

I fail to find this information after some google search and hope someone here will know.

Answer 1

With a couple of highly specialized exceptions (directks, ASIO, openal), all audio rendering in Windows goes through WASAPI.

This includes audio rendering via winmm and directsound.