For want of a better way to describe it, the song goes: "Bluh! Bluh! du-de-du-de-du-duh-duh, Bluh! Bluh!"
I want to know how to make the "Bluh!"

http://www.youtube.com/watch?v=arWouqZf0kk
I use reason, so that would help if you can talk to me in reason language.
Thanks,
~Orinoco.
P.S, If this has already been asked an answered in another thread, I did try searching, I came up with nothing.