 Most of the prayers in the Shabbat morning service are rendered in a prose recitative, the exact tune of which varies with the maqam of the week.However, certain important passages, such as Nishmat and Kaddish, are sung to the tunes of specific Pizmonim, which are chosen according to a rota so as to fit the maqam of the week.The cantillation of the Torah does not follow the maqam of the week, but is almost invariably performed in maqam Sigah.