Aron Wolff Berlijn, The Dutch Priestly Melodies, p.6
The Shavu'ot melody is based on Akdamut.
The Sukkot melody is based on Hodu Lesukkot.
Chazzan Maroko pointed out that the tune for shacharit shel Matnat Yad is largely based on the daily recitative used in Frankfurt for "Divrei 'Elokim Chayim" and "Habocheir Be'amo Yisra'eil Be'ahavah." See Ugutsch, "Der Frankfurter Kantor", No. 13.