The Art of Counterpoint

9 Examples ascends one step ascends or descends ascends three Boetius called diapente chromatic semitone commonly called composed music CONCERNING THE DIAPENTE consonances contains five tones contains ten tones Contrapunctus Tenor Contratenor diapente with ditone diapente with semitone diapente with tone diatesseron discord contains distance double diapason Examples Chapter extreme notes false concords fictum fifteenth fifth figured music four semitones four steps Guidonian hand Hence imperfect diapente isorhythmic Johannes Regis Johannes Tinctoris Liber de arte major semitone minima minor prolation mixture motet moved musician nineteenth octave pason perfect concords perfect tempus perfect third pitches placed plainchant proven rarely or never reason rule seen semibreve semiditone seventeenth simple counterpoint singing super librum sixth song SUPERFLUOUS DIAPENTE taken tenor ascends tenor descends three tenor remains immobile thirteenth three or four three semitones three tones tones and five tones and four tones and three triple diapason tritone twentieth twenty-second unison voice vulgarly called