|
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 18 generations the expression "X" became this: | transpose(transpose(echo(((echo(((((((echo((((step(X,12) +transpose(transpose(X,-7) ,4) ) +transpose((transpose(X,-7) +transpose(X,-7) ) ,7) ) +transpose((X|echo(X,4,6) ) ,12) ) ,4,6) +transpose(transpose(((((X+transpose(((X+transpose(X,12) ) |shuffle(X) ) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(transpose(shuffle(echo(X,4,6) ) ,-7) ,12) ) +transpose(((X+transpose(X,12) ) +step(X,12) ) ,-5) ) ,-5) ,4) ) +transpose(((transpose((transpose(X,4) +transpose(X,-5) ) ,-5) |step(step((X+transpose(X,12) ) ,12) ,12) ) +transpose(step((shuffle((transpose(arpeggio(X) ,4) +transpose(X,12) ) ) +transpose(transpose(((X+transpose(X,7) ) +((X|X) +transpose(X,-5) ) ) ,-7) ,7) ) ,12) ,12) ) ,7) ) +transpose(transpose(transpose((((transpose(X,4) |((X+X) +step(X,12) ) ) |(((X+transpose(X,12) ) +X) |step(X,12) ) ) +transpose(echo(arpeggio(transpose(X,-7) ) ,4,6) ,7) ) ,-7) ,4) ,4) ) +transpose((transpose((((transpose(X,4) +((transpose(X,-7) +transpose(transpose((step(X,12) +transpose(shuffle(X) ,7) ) ,4) ,4) ) +transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,7) ) ) +transpose(step((transpose(X,-7) +transpose((step(X,12) +X) ,-5) ) ,12) ,4) ) +transpose(((transpose(transpose(echo(X,4,6) ,-5) ,4) +transpose(step((transpose(X,-5) +echo(X,4,6) ) ,12) ,12) ) |arpeggio((transpose(X,-5) +transpose((X|X) ,12) ) ) ) ,7) ) ,-7) +(((X+transpose(X,7) ) +transpose((echo(((X+transpose(X,12) ) |echo(X,4,6) ) ,4,6) +(step(X,12) |(X+transpose(X,12) ) ) ) ,12) ) +arpeggio(((transpose(X,-5) |X) +arpeggio(X) ) ) ) ) ,7) ) +transpose(transpose(((((transpose((X+transpose(X,7) ) ,4) +arpeggio(arpeggio(shuffle(X) ) ) ) +transpose(((X|X) +((X|X) +shuffle(X) ) ) ,4) ) +transpose((((((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(step(X,12) ,7) ) ,4) ) +transpose(X,7) ) +transpose(shuffle(echo(step(X,12) ,4,6) ) ,4) ) +transpose((((X+step(X,12) ) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) ,-7) ) +transpose((((X|X) +step((X+transpose(X,7) ) ,12) ) +transpose((((((X+transpose(X,7) ) +transpose((X|transpose(X,-7) ) ,12) ) +transpose((transpose(transpose(X,-5) ,4) +transpose(transpose(X,4) ,-7) ) ,4) ) +transpose(((echo(echo((X+transpose(X,7) ) ,4,6) ,4,6) +transpose(((X|X) +transpose(X,7) ) ,4) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,7) ) +transpose((((((X+transpose((transpose(X,4) +X) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(transpose(((X+transpose(X,7) ) +transpose(X,12) ) ,-5) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,-7) ,7) ) +transpose(transpose(X,-7) ,12) ) ,7) ) ,12) ) ,12) ) ,-7) ,12) ) +((((transpose(step(echo(X,4,6) ,12) ,-5) |transpose(echo(transpose((transpose(X,4) +(echo(X,4,6) |(X|X) ) ) ,-5) ,4,6) ,4) ) +((arpeggio(step(((transpose(X,-7) +transpose(transpose(X,-7) ,4) ) +transpose((arpeggio(X) +transpose(X,7) ) ,7) ) ,12) ) +transpose((arpeggio(transpose((((transpose(X,4) +X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) |(X+X) ) ,4) ) +transpose(step(transpose(((transpose(X,-7) +transpose(X,4) ) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) ,-5) ,12) ,7) ) ,4) ) +transpose((((step(transpose(transpose((X+X) ,4) ,-7) ,12) |transpose((transpose(X,-7) +X) ,-5) ) +transpose(((((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) |((X+transpose(transpose(X,-7) ,4) ) +transpose(arpeggio((X+transpose(X,12) ) ) ,7) ) ) ,12) ) +transpose(((echo(X,4,6) |X) |transpose(((X+transpose(X,7) ) +transpose(X,7) ) ,4) ) ,12) ) ,7) ) ) +transpose(arpeggio(transpose(((X+X) +transpose((X|X) ,7) ) ,-5) ) ,4) ) +transpose(((transpose(transpose(((arpeggio(X) +transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ,-5) ,-7) |((((((X|X) +transpose(echo(X,4,6) ,12) ) +((transpose(X,-5) +transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ) +transpose((transpose((X+X) ,4) |step(shuffle(X) ,12) ) ,7) ) +(((X|(X+transpose(X,12) ) ) +transpose(X,12) ) +transpose(transpose(transpose(((X+X) |X) ,-5) ,4) ,7) ) ) +transpose(shuffle(transpose(((X|(X+transpose(X,12) ) ) +transpose((X+X) ,12) ) ,-5) ) ,7) ) ) +(transpose(((((shuffle((X+transpose(X,7) ) ) +transpose(((X+transpose((X|X) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) +transpose((shuffle((arpeggio(X) +(X+X) ) ) +echo(X,4,6) ) ,4) ) +transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(echo((X+X) ,4,6) ,12) ) ,7) ) ,-5) |shuffle((((X|X) |(transpose(X,-7) +X) ) +transpose((step(transpose(X,4) ,12) +echo(X,4,6) ) ,12) ) ) ) ) ,7) ) ) ,4,6) +transpose(transpose((echo(((echo((transpose((((X|X) +transpose(X,4) ) +transpose(X,7) ) ,4) |(((X+X) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) ) ,4,6) +transpose(transpose((X+transpose(arpeggio(X) ,7) ) ,-7) ,7) ) +((transpose(X,-5) +transpose(X,12) ) +echo(transpose((X|((X|X) |X) ) ,4) ,4,6) ) ) ,4,6) +transpose(shuffle(transpose(transpose(((shuffle(X) +transpose((X+transpose(X,12) ) ,7) ) +X) ,4) ,-7) ) ,7) ) ,-5) ,4) ) +transpose(((((((((arpeggio(X) +transpose(transpose(transpose(X,-7) ,-5) ,12) ) +transpose(echo(transpose(transpose(X,-7) ,-7) ,4,6) ,4) ) +transpose((shuffle(((transpose(X,-5) +transpose(transpose(X,4) ,4) ) +transpose((X+X) ,7) ) ) +transpose(transpose(transpose((X+transpose(X,7) ) ,-5) ,-5) ,7) ) ,7) ) +transpose(transpose((((transpose(X,4) +((X+transpose(X,4) ) +transpose(X,7) ) ) |step(arpeggio(X) ,12) ) |(transpose(((X+X) |X) ,-5) |(transpose(X,4) +transpose(echo(shuffle(X) ,4,6) ,7) ) ) ) ,-5) ,4) ) +transpose((echo(transpose(((X+X) +(X|X) ) ,4) ,4,6) +transpose(transpose((transpose(shuffle(transpose(X,-5) ) ,-5) +transpose(transpose(arpeggio((transpose(X,4) |(X+X) ) ) ,-7) ,12) ) ,4) ,12) ) ,7) ) +transpose(((transpose(X,4) +transpose(((X|X) +transpose(X,7) ) ,12) ) +(transpose(X,4) +(X|(X+X) ) ) ) ,12) ) +step(step(step((transpose(X,-5) +X) ,12) ,12) ,12) ) +transpose((echo(((X+transpose(transpose((X|X) ,-5) ,7) ) +transpose(transpose(((X+transpose(step(X,12) ,4) ) +transpose(X,7) ) ,4) ,7) ) ,4,6) |transpose((((arpeggio(X) +transpose(step((X|((X+transpose((X+X) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ,12) ,4) ) +transpose((X+X) ,7) ) +transpose(echo(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ,4,6) ,7) ) ,4) ) ,-5) ) ,7) ) ,4,6) ,-7) ,4) random seed used was 140255569
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |