http://youtube.com/watch?v=pJw_PeadXsA
This is the original pulse teaser trailer, I'll list the tracks in the order they appear.
First one is De Konstruct (It looks a little different)
Then Tech de Ra, Just before the finish line on the white run.
Then Metropia Black, the bit straight after the vertical drop.
Then Talons Junction, the Dynamic Concordia Loop.
And then this mystry track, which I can only asume is either in one of the downloadable packs, or was scrapped from the game, let's hope the former .
Last one is Basilico