Question about the Singularity Engine by Halo

Hi,

I've been looking at the Singlarity Engine that Halo has made available for download from the leadworks site.

WOW! Nice work dude.

One question though.

Are the sound effects that come with it, royalty free and not just lifted from an existing game.

Cheers,

RV

may as well add a question here.
i haven't checked the demo yet but im expecting some pretty cool stuff in it, can i use these cool bits in other stuff ie graphical stuff?