DirectShow raw data access

Question

How do you access the raw data of a sound file after using DirectShow to load it?

What interface allows you to access the raw data of a waveform, for example?

Answer 1

IMediaSample::GetPointer

Answer 2

Insert the Sample Grabber filter between file parser and audio card (or other renderer) and query ISampleGrabber interface. It will give you the data as it's passing through.