UTAU: What IS it?

Here are  a few facts about UTAU:

• It is NOT Vocaloid. It is UTAU, a program that is for free.
• It has the same functions as Vocaloid.
• Teto is a UTAU.
• Since UTAU and Vocaloid are similar, they are usually mentioned together.

I actually have UTAU >.<. It's hard to use. I think the Rs are the voice itself. I'm sure, that the only thing that plays, if I'm wrong, why does only the R work? It shows up as the other note.
Anyways, UTAU has it's own wikia:
utau.wikia.com
It has everything, download link (here)
Also, PLEASE do not flood me with questions on how to use it. You will need your computer to be compatible with Japanese fonts.
Anyways, I got the Demo for MIRIAM. It really needs more than "ooh" or the other words. *sigh*