Take a look at the example below and try to find commonalities between each melodic line:
You might have noticed that these melodic lines are augmentations or diminutions of each other in some form. Also, they all start at the same time. This is called a mensuration canon.
To build one, experiment with different rhythmic ratios and intervallic transposition between each voice of the canon. Typically, the voices start on either the tonic or dominant, but that is now always the case.
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