What is the name of this song (opera)?

It goes like :

AAaaaaaah-Ah-Ah-Ah, AAaaaaaah-Ah-Ah-Ah, ah-AH-ah-AH-Ah-ah-ah-AH-ah

Aaaaaah, is pronlonged ah

AH%26gt; Ah%26gt; ah

It's quite a famous piece, but i never got around to getting the name.

If you don't know the name, but you listen to alot of classical/opera , list me a few of the most famous titles.

What is the name of this song (opera)?opera browser

Aaaahh, not enough information, sorry. Please be more specific.

What is the name of this song (opera)?microsoft windows internet explorer

do you know the notes by any chance? Where did you first hear it, or see it performed?
It could be the Humming Chorus from Madam Butterfly by Puccini. However, without notes or a frame of reference, it's very difficult to determine the piece.
Vissi D'Arte

Elucevan Le Stelle

Celeste Aida

Brindisi

In fernum land

O Mia Norma

Largo al factorum

ce petite table

Sempre Libera

o mio babino caro

che gelida manina

nessum dorma

habanera

la fleur que tu m'avais jete
Is it Bachianas Brasileiras, by Villa Lobos? It might be #5 the Cantilena.