First Episode

See:

Invertible counterpoint

Transformation by inversion

The first episode starts in measure 8 and ends in measure 12. Some interesting aspects in this episode:

Here is the discussed section:

Let's take a closer look at the invertible counterpoint. The seventh interval in measure 6 becomes a sixth in measure 8. The fourth inverts into a ninth. This signals an inversion at the twelve as you can see in the inversion tables:

Inversion at the twelve table

This interval: 1 2 3 4 5 6 7 8 9 10 11 12
Inverts as: 12 11 10 9 8 7 6 5 4 3 2 1

Other methods to find the inversion type:

Another method:

In measures 7 and 9 (bass and alto), the fifth interval inverts as sixth. This is inversion at the tenth:

Inversion at the tenth table

This interval: 1 2 3 4 5 6 7 8 9 10
Inverts as: 10 9 8 7 6 5 4 3 2 1

© 2011 José Rodríguez Alvira. Published by teoria.com


  

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