Here are a couple links to the appropriate spot on MSDN:
Audio Compression Manager Home
And I think this is the link to download the SDK
but it's hard to tell with Microsoft's oh-so-helpful "Latest" lists...
I have some reasonable VB skills. I can get a project reference, create an object, call it, etc. But the examples in the SDK are all C++ and I'm having trouble figuring out how to tackle it in VB.
Thanks again for the help!