|
Expresso takes a simple musical expression (literally "X") and mutates it.
In each generation, transformations are applied to
components of the expression. This is a fractal technique known as an
L-system.
The more generations there are, the larger and
more complex the expression gets (and the longer it can take
to compute).
The output varies wildly, from boring to fascinating.
Press "Mutate" a few times
till you get something that looks interesting, then click
on the image to play it. See Composer's Quarry for examples of output.
| |
|
After 20 generations the expression "X" became this: | echo((((transpose(echo(transpose((((transpose(((X+transpose(transpose(transpose(X,-5) ,-5) ,4) ) +transpose(X,7) ) ,-5) +transpose((((transpose(X,-7) |(X+X) ) +transpose((transpose(echo(X,4,6) ,4) |X) ,7) ) +shuffle(echo(X,4,6) ) ) ,4) ) +transpose(echo(((shuffle((transpose(X,-5) |(X+X) ) ) +transpose(arpeggio(transpose(transpose(X,4) ,4) ) ,7) ) +transpose(transpose((X+X) ,-7) ,12) ) ,4,6) ,7) ) +transpose((step((arpeggio(transpose(X,-7) ) +transpose(((X+transpose(X,12) ) +transpose(X,-5) ) ,7) ) ,12) |((X|(X|echo((X+transpose(X,7) ) ,4,6) ) ) |step(transpose(transpose((X+transpose(X,7) ) ,4) ,4) ,12) ) ) ,7) ) ,4) ,4,6) ,4) +transpose(transpose(transpose(shuffle((transpose(((((shuffle(transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,4) ) +transpose((echo((X|X) ,4,6) |(X|X) ) ,4) ) +transpose((X|X) ,7) ) +transpose((transpose((arpeggio(X) +echo((X+X) ,4,6) ) ,4) +transpose(step((X+transpose(X,12) ) ,12) ,7) ) ,7) ) +transpose(step((((transpose(shuffle(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,-5) +transpose((X|X) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose((transpose(((X|X) +transpose(X,7) ) ,-7) +shuffle(transpose(X,-5) ) ) ,-7) ,7) ) ,12) ,7) ) ,4) |(step(((step((shuffle(X) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,7) ) ,12) |X) |(echo((shuffle(X) +(((X|X) +transpose(shuffle(X) ,4) ) +transpose(X,7) ) ) ,4,6) +(X+transpose(shuffle(transpose(X,-5) ) ,7) ) ) ) ,12) |transpose((echo(echo(X,4,6) ,4,6) +transpose((shuffle((transpose(transpose(X,-5) ,4) +(X|X) ) ) +transpose((step(shuffle(X) ,12) +transpose(((X+transpose(X,7) ) +transpose(X,7) ) ,12) ) ,12) ) ,12) ) ,-7) ) ) ) ,-5) ,4) ,12) ) |(((transpose(((((transpose(shuffle(((X|(X|X) ) +((X+X) +transpose(X,7) ) ) ) ,4) +transpose((transpose(((echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) |echo(((X+X) |shuffle(X) ) ,4,6) ) ,12) ) +(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) +transpose(X,12) ) ) +transpose(transpose(shuffle(shuffle(transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +shuffle(X) ) ,-5) ) ) ,-5) ,7) ) |(transpose((transpose(step(X,12) ,4) +transpose((transpose(step(X,12) ,-5) |shuffle(transpose(X,4) ) ) ,12) ) ,4) |(step(transpose(transpose(step(X,12) ,4) ,-7) ,12) |step(transpose(X,-5) ,12) ) ) ) ,4) +transpose(((transpose(shuffle((step((arpeggio(transpose(X,-7) ) +echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ,12) |transpose(transpose(X,-5) ,4) ) ) ,-5) +(((((X|X) +transpose(transpose(transpose(X,4) ,-7) ,4) ) +transpose(arpeggio(transpose(X,-5) ) ,7) ) |shuffle(((X|((X+transpose(X,12) ) +transpose(X,7) ) ) +(transpose(X,-5) +transpose(transpose(transpose(X,-5) ,-7) ,12) ) ) ) ) +transpose(transpose(((transpose(transpose(X,-5) ,-5) +transpose(((transpose(X,4) +transpose(transpose(shuffle(X) ,4) ,4) ) +transpose((((X+transpose(X,7) ) +transpose(step(X,12) ,4) ) +transpose((X|transpose(X,-5) ) ,7) ) ,7) ) ,7) ) +transpose((transpose(X,4) |((X+X) +X) ) ,7) ) ,-7) ,-7) ) ) +((transpose(shuffle(shuffle((transpose((X|X) ,4) +((transpose(X,4) +transpose(step(X,12) ,4) ) +transpose((X+X) ,7) ) ) ) ) ,4) |(transpose(((arpeggio((X+transpose(X,7) ) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) ,-7) +transpose(transpose(transpose(transpose(step(X,12) ,-7) ,-5) ,-5) ,7) ) ) |transpose(transpose((step(arpeggio(X) ,12) +shuffle(transpose(transpose(transpose(transpose(X,-5) ,-5) ,-7) ,-5) ) ) ,-5) ,4) ) ) ,4) ) +transpose(transpose(transpose(shuffle((echo(shuffle((echo(((((transpose(X,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4,6) +(transpose((((X+transpose(X,4) ) +transpose(X,7) ) |echo(X,4,6) ) ,-7) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,-7) ) ) ) ,4,6) |((transpose((((X+X) +transpose(X,7) ) +(X+transpose(X,12) ) ) ,4) +transpose((transpose(X,4) |transpose(X,4) ) ,12) ) |transpose(step(arpeggio((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,12) ,-5) ) ) ) ,4) ,-5) ,7) ) |echo(((((((transpose(transpose(shuffle(X) ,-5) ,-5) +transpose(transpose(transpose((((X|X) +transpose(X,4) ) +transpose((X|X) ,7) ) ,-5) ,-5) ,12) ) +transpose((((((echo(X,4,6) +transpose((X|X) ,7) ) +transpose((transpose(X,4) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose((((X+transpose(X,12) ) +transpose((echo((X+X) ,4,6) +step(X,12) ) ,4) ) +transpose((transpose(X,4) +transpose(transpose(X,-5) ,12) ) ,7) ) ,7) ) +transpose(transpose(((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ,12) ) +transpose(arpeggio((transpose(X,-5) |X) ) ,7) ) ,12) ) +transpose((transpose(step((X+X) ,12) ,-7) +shuffle(transpose((arpeggio((X+transpose(X,7) ) ) +transpose((transpose(X,-5) +transpose(transpose(transpose(X,4) ,-5) ,7) ) ,7) ) ,4) ) ) ,12) ) |((transpose(shuffle((X|X) ) ,-7) +transpose(step(transpose((transpose(X,-5) +((X+transpose(X,7) ) +(X+X) ) ) ,-5) ,12) ,4) ) +transpose(((X|X) |echo(X,4,6) ) ,7) ) ) |(((X+X) |(((X+transpose(X,4) ) +transpose(X,7) ) |shuffle(X) ) ) +transpose(((X|X) +transpose(transpose(transpose(transpose(X,4) ,-5) ,4) ,12) ) ,12) ) ) +transpose((transpose(step(transpose(X,-7) ,12) ,-5) +transpose(transpose(shuffle((shuffle(X) +X) ) ,-5) ,12) ) ,-7) ) ,4,6) ) ) +transpose(transpose(step((((shuffle(echo(echo(transpose(((transpose(X,-7) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,4) ) +transpose((X+X) ,7) ) ) |transpose(echo(X,4,6) ,-5) ) ,-5) ,4,6) ,4,6) ) +transpose(transpose(step(echo(transpose((((echo(transpose(X,4) ,4,6) |step(transpose(transpose(X,4) ,4) ,12) ) +transpose((transpose(X,-5) |(transpose(X,4) |echo(X,4,6) ) ) ,12) ) |((X|X) +echo(echo(X,4,6) ,4,6) ) ) ,4) ,4,6) ,12) ,-7) ,4) ) +transpose(((transpose(transpose(((((X|X) +transpose(echo(X,4,6) ,12) ) +transpose(echo((X|X) ,4,6) ,4) ) +transpose(((X+X) |(X+X) ) ,7) ) ,-5) ,4) +transpose(transpose(step(((X+transpose((X+transpose(transpose(X,-5) ,12) ) ,4) ) +transpose(step(shuffle(X) ,12) ,7) ) ,12) ,-7) ,12) ) +transpose((transpose((X+arpeggio(X) ) ,-5) |((shuffle(X) +transpose((X+transpose(X,12) ) ,12) ) +transpose((transpose(X,-5) |arpeggio(X) ) ,7) ) ) ,-5) ) ,7) ) |transpose(transpose(transpose(echo((transpose(transpose(transpose(X,4) ,-5) ,4) +(transpose(transpose(step(transpose(X,4) ,12) ,4) ,-5) +transpose((transpose(X,-5) |arpeggio(X) ) ,12) ) ) ,4,6) ,-7) ,-7) ,4) ) ,12) ,4) ,7) ) ,4,6) random seed used was 10532360
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |