I have used Audacity (a free audio editor program) in making a remix of the 2nd opening song in Death Note. I have taken some portions of audio from sources that I think you might find interesting. But anyway, here is the remix I did:
http://media.putfile.com/Death-Note-Remix-85
Now as for my sources, that yelling sound that you hear was taken from the episode "Ghost Channel" in Code Lyoko. Go to 6:05 in this video and you'll hear that strange yell:
http://www.youtube.com/watch?v=CzM4jWffLac
As for the guy singing in the song (which is just the speech at a lower pitch), I took that from this video right here:
http://www.youtube.com/watch?v=C9runNgtTb0
And finally, as for that other small portion of music I added (which I repeated once to go with the remix), I took that from the song "Type the End" from the anime show Eureka Seven. Go to 1:06 in this video to hear it:
http://www.youtube.com/watch?v=UWt83Hf76XM