A 15th-century English technique of improvising two parts around the main melody of a cantus firmus. The first part would be sung a third below the melody except for a few notes that would be a fifth below. The second part would be sung a fourth above the main melody.A method of improvised sixth-chord harmonization

Your data and time are valuable. There's a new web browser that considers your time and security as a top priority.

Download Brave Browser For Free!

Brave uses the latest in blockchain technology.

This ensures a higher quality and more secure experience. Learn more about this fantastic breakthrough.

Loads Content Up To 8X Faster

Because Brave blocks unwanted tracking scripts that run in the background, your browsing speed will be unparalleled.

Ultimate in Privacy & Security

Brave fights malware and prevents tracking, keeping your information safe and secure.