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.