the scales that gregorian chants were derived from
Gregorian chant Early plainchant, like much of Western music, is believed to have been distinguished by the use of the diatonic scale. Modal theory, which postdates the composition of the core chant repertory, arises from a synthesis of two very different traditions: the speculative tradition of numerical ratios and species inherited from ancient Greece and a second tradition rooted in the practical art of cantus. The earliest writings that deal with both theory and practice include the Enchiriadis group of treatises, which circulated in the late ninth century and possibly have their roots in an earlier, oral tradition. In contrast to the ancient Greek system of tetrachords (a collection of four continuous notes) that descend by two tones and a semitone, the Enchiriadis writings base their tone-system on a tetrachord that corresponds to the four finals of chant, D, E, F, and G. The disjunct tetrachords in the Enchiriadis system have been the subject of much speculation, because they do not correspond to the diatonic framework that became the standard Medieval scale (for example, there is a high F#, a note not recognized by later Medieval writers). A diatonic scale with a chromatically alterable b/b-flat was first described by Hucbald, who adopted the tetrachord of the finals (D, E, F, G) and constructed the rest of the system following the model of the Greek Greater and Lesser Perfect Systems. These were the first steps in forging a theoretical tradition that corresponded to chant.
Renaissance music Because numerous copies of Dunstaple's works have been found in Italian and German manuscripts, his fame across Europe must have been widespread. Of the works attributed to him only about fifty survive, among which are two complete masses, three connected mass sections, fourteen individual mass sections, twelve complete isorhythmic motets and seven settings of Marian antiphons, such as Alma redemptoris Mater and Salve Regina, Mater misericordiae. Dunstaple was one of the first to compose masses using a single melody as cantus firmus. A good example of this technique is his Missa Rex seculorum. He is believed to have written secular (non-religious) music, but no songs in the vernacular can be attributed to him with any degree of certainty.