WinRT: Grab audio buffer from AdaptiveMediaSource

Question

Hello,

I am looking for a way to grab the audio buffer of an AdaptiveMediaSource in the WinRT API. My objective is to pass the buffer to another sound engine.
I have found this sample: https://github.com/microsoft/Windows-universal-samples/tree/main/Samples/AdaptiveStreaming

However, I haven't found a way to grab the audio buffers via the different callbacks. Ideally, I'd want the audio buffers as they are ready to be played, not necessarily as they get downloaded.

Any help would be appreciated!!

Bruno