Non-Wave files under "Media" section - What are they?

Hey guys,

Searching for samples I encounter something I don’t recognize. Let’s use this screenshot as an example:


I talk about the “Chip Tune - Level Up” and “Chipmunks On Crack” examples that have the same symbol:
image

A) What this symbol represents? What is is? obviously not samples.
B) How can I access it?

Thanks