First time I heard this song, I fell in love with. It's beautiful and melodious. And believe it or not, it's not a Moroccan song. It's origin is from Yerushalayim (or Egyptian) and can be adapted to many parts of the Tefila.
It's the climax of the entire Torah. The moment the world was created. The recital of the Ten Commandments in any synagogue is a special moment. In a Moroccan synagogue it's no different. More than that, the congregation has the custom to rise just as the hazan recites the holy words of the Aseret HaDibrot. For your listening pleasure, I have recorded the Ten Commandments in its entirety.