• The superius sings the cantus firmus 

• The tenor sings in 6ths below the CF 

• The bassus alternates 8ves and 10ths below the CF 

• The altus alternates 4ths and 3rds below the CF, in coordination with the bassus

The 4 voices imitate each other, especially at the beginning of phrases.

On a cantus firmus taken from the repertoire, in early notation, singing with the words

Resources

Tutorial : Practical handbook, p. 84

Notated cantus firmi : Practical handbook, p. 209

Historical notated examples : SuperLibrum database