IIRC, this lady makes an oo sound (the line being on top of the oo).... Sounds like move...or moo...but in a high pitch kind of way. Tis the best way I can describe it going off of memory. :/ Thanks again NERV.
Edit:If it helps even more, if you were to listen to Anata o kanjite-iru - Mia Santi Ren off the Macross II OST Volume 2 CD (Track 17...played during when Ishtar sings the song of the Alus) it sorta sounds like the ppl in the background with their "ooo"s. Well, that song/acappella in that one episode of InuYasha made me think of that song in Macross II...so I dunno. I can't think of anything else.