Johannes Ciconia is well known as a composer, but his theoretical works have been available only in manuscript form. This is an edition of both of Ciconia's theoretical works: the "Nova musica", with its attendant "De tribus generibus melorum", and the shorter "De proportionibus", itself a revision of the third book of the "Nova musica".

Johannes Ciconia (ca. 1370-1412) is well known today as a composer both of sacred and secular music, but his theoretical works, probably written in Padua during the first decade of the fifteenth century, have until now been available only in manuscript form. This is the first complete edition of both of Ciconia's theoretical works: the "Nova musica", with its attendant "De tribus generibus melorum", and the shorter "De proportionibus", itself a revision of the third book of the "Nova musica".