So the first example I want to share with you about a particular process
applied to a pattern is a composition by Steve Reich.
Very influential, again in the evolution of music in the 20th century.
He was one of the people who started the-- what is called
now Minimalist Music. That is, the idea of using a minimal pattern, and
then modifying the sequentially in creating a composition out of that.
And again, I encourage you to look for information about Steven Reich and the
minimalist music.
There are an enormous amount of resources you can find online.
What I want to discuss today and show you is, again, is an
example of algorithmic...
An application of an algorithmic concept to a very simple modif.
And this is, called
Piano Phase, this piece is a composition for two pianos, where there is a 12-note
pattern that is played by one pianist continuously and unchangeably.
So, it's basically the same thing over and over again. While the other pianist
plays some rotations on the original pattern and progressively gets out of
phase with the first pianist.
So, it creates this kind of horizontal movement between the two patterns that
eventually, at the end of the composition finds...
Find themselves again in unison. So there is all this phase change within the
composition that is based on a very simple algorithm.
We can listen to this in the PowerPoint or any streaming service that you
may choose.
And this is the original square, the first line of the original square of
Steve Reich for Piano Phase. Where you see the patterns, and the way which they
move from one section to another section. And as you see in the notebook associated
to this unit, we can reproduce exactly this behavior algorithmically
with a very simple set of instructions.