Structures of the Andalusian theme II. External forms - Nawba. If the internal structure of the Andalusi song provides the nucleus of the melodic modality, the external structure provides the internal connections that give the characteristic form of the Andalusi song. A logical connection is also established between the different songs, forming what is known as the Nawba. Other external elements, such as the mawwal, enrich the external structure of the Andalusi song and of the repertoire. Musical microcosm and macrocosm as a mirror of the Andalusi intellect in its musical manifestation.