He is best known as the composer of polyphonic alleluias. Each of Wycombe's alleluias is in four sections. Even relatively florid chants like Alleluias may have a narrow ambitus. The SDSO official song is "Alleluias for Orchestra" written by South Dakota composer Stephen Yarbrough. Alleluias are not sung during penitential times, such as Lent. Alleluias were frequently troped, both with added music and text. Alleluias appear in every Mass except the Masses of Holy Week.