Hi everyone,
I'm studying counterpoint, and I'm using Alfred Mann's translation of the Gradus ad Parnassum. I have a question about cantus firmi.
In my music history classes from college, and in some of the books I've read, a cantus firmus is derived from chant. My question is: HOW is a cantus firmus derived? The melodies I have in books of chant are very, very different from the cantus firmi in the Gradus ad Parnassum. Did Fux use a particular method to modify or rework existing chant melodies in order to use them as cantus firmi? If anyone can help me or point me in the right direction, let me know.
Thanks in advance,
Clayton