sentences:  Presumably Striggio used this as a compositional tool, to keep track of the harmonies as he wrote forty to sixty voice parts above it; it also foreshadowed the development of the basso continuo in the 17th century.The "Missa sopra Ecco sì beato giorno" is probably a parody mass, i.e.one based on a pre-existing polyphonic work, in this case named "Ecco sì beato giorno".