Three Plus Flutes for three soprano with opt. 4th/ob. with alto and bass. Opening with the upper two parts and then adding the lower voices gravitating to a block harmonic structure. The middle section starts with lower voices using a extraneous motif and stacked with upper voices doing the same in imitation. Then with more vigor all voices join in block harmonies until the final section where again imitation takes place until the final block harmonies take place.