A cappella Using a simple chord progression and layered ostinati, Matthew Culloton renders the steady, peaceful current of the river in this luscious choral setting for a cappella chorus. The rich textures are achieved with limited divisi that are always accessible and perfectly selected for the right interpretive moments. This is a sound tapestry conceived in the best tradition of the American spiritual that is appropriate for worship, concert and festival appearances. Exquisite!