|
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: | transpose(arpeggio((arpeggio((transpose(transpose(X,-5) ,-5) +transpose(echo((step(X,12) +(transpose(transpose(X,4) ,-5) +transpose(transpose((X|transpose(X,-7) ) ,-5) ,7) ) ) ,4,6) ,12) ) ) |(((((step(echo(((shuffle((X|X) ) +transpose(transpose(transpose((X+X) ,-5) ,-5) ,12) ) +transpose(transpose(transpose((X+transpose(X,7) ) ,-5) ,-7) ,12) ) ,4,6) ,12) +transpose(echo(transpose(arpeggio(transpose(((step(shuffle(X) ,12) +(shuffle(X) +transpose((X+X) ,7) ) ) +transpose(((arpeggio(X) |transpose(X,4) ) |shuffle(X) ) ,12) ) ,-5) ) ,-7) ,4,6) ,12) ) |(arpeggio(echo(X,4,6) ) +transpose(arpeggio(shuffle((transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) ,-7) |transpose((arpeggio((transpose(X,-7) +transpose((X|X) ,7) ) ) +transpose((X|echo((X+transpose(X,7) ) ,4,6) ) ,7) ) ,4) ) ) ) ,7) ) ) +transpose(transpose(step(transpose(transpose(((transpose(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose((shuffle(X) +transpose(X,7) ) ,4) ) +transpose(transpose((X+transpose(X,12) ) ,4) ,7) ) ,-5) +transpose(shuffle((shuffle(X) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-7) ,12) ) ) ,4) ) +transpose((transpose(transpose(((X+transpose(X,12) ) +transpose(transpose((X|X) ,-7) ,7) ) ,-7) ,4) |(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) +transpose((X+X) ,-5) ) ) ,7) ) ,-5) ,4) ,12) ,-7) ,4) ) +transpose(transpose(transpose((((transpose((((arpeggio(transpose(X,-7) ) |transpose(X,-7) ) +transpose(((transpose((X|X) ,-7) +(transpose(X,4) +transpose((X+X) ,4) ) ) +transpose(echo(transpose(X,-5) ,4,6) ,12) ) ,4) ) +transpose((shuffle(transpose(X,-5) ) +((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) |((X+transpose(X,4) ) +transpose(X,7) ) ) |((X+transpose((transpose(X,-5) +transpose(X,-5) ) ,4) ) +transpose((X+(X+X) ) ,7) ) ) ) ,7) ) ,-5) |((transpose(shuffle(((transpose(X,4) +transpose(echo(X,4,6) ,7) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,4) ) ) ,4) +transpose(transpose((step(((X+X) |arpeggio(X) ) ,12) +step(echo(X,4,6) ,12) ) ,-5) ,7) ) +transpose(transpose((transpose(transpose(X,-7) ,-5) +transpose(arpeggio(((X+X) +(step(X,12) +transpose((X+X) ,7) ) ) ) ,12) ) ,-7) ,12) ) ) +transpose((((echo((X+transpose(X,7) ) ,4,6) +transpose(echo(X,4,6) ,12) ) |transpose(arpeggio(step(X,12) ) ,-7) ) |(((step(transpose((X|X) ,4) ,12) +transpose(transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) |(((X+transpose(X,4) ) +transpose(X,7) ) |step(X,12) ) ) ,-7) ,4) ) +transpose((((transpose(X,-5) +transpose((X+X) ,4) ) +transpose((X+X) ,7) ) |transpose(transpose(X,4) ,4) ) ,7) ) +transpose(((X+X) +transpose(transpose((X+X) ,-5) ,12) ) ,7) ) ) ,7) ) +transpose(echo(((transpose(((((((transpose(X,4) +transpose(X,4) ) +transpose(transpose((X+transpose(X,7) ) ,-5) ,7) ) +transpose(transpose(X,-7) ,12) ) +transpose(arpeggio(transpose((X|X) ,4) ) ,12) ) +transpose((((transpose(((echo(X,4,6) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,-5) +transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose(((X|X) |shuffle(X) ) ,7) ) +transpose(echo(((transpose(X,-7) |X) +(transpose(X,-7) +transpose(X,12) ) ) ,4,6) ,12) ) ,4) ) +transpose(((transpose(X,-7) +transpose((X|X) ,7) ) +(transpose(X,-7) +(X|X) ) ) ,7) ) ,-5) +transpose(arpeggio(step((transpose((echo(X,4,6) +transpose((X+transpose(X,7) ) ,12) ) ,-7) |transpose(X,4) ) ,12) ) ,4) ) +transpose(((step(transpose(echo(transpose(X,4) ,4,6) ,4) ,12) +transpose((((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,12) ) +X) ,7) ) ,-5) +transpose((echo(X,4,6) +arpeggio((X+X) ) ) ,12) ) |echo(X,4,6) ) +transpose(shuffle((((X+arpeggio(X) ) +transpose((((X+transpose(X,12) ) +transpose(transpose(arpeggio(X) ,-5) ,4) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) ,4) ) +transpose(X,7) ) ) ,12) ) ,4) ) +transpose(echo(((echo(transpose((X|shuffle(X) ) ,-5) ,4,6) +transpose(transpose(shuffle(X) ,-7) ,4) ) +transpose(transpose(echo(step(step(X,12) ,12) ,4,6) ,-5) ,7) ) ,4,6) ,7) ) ,7) ) ,4,6) ,12) ) ,-7) ,4) ,7) ) +((arpeggio(arpeggio(transpose(((transpose(transpose(X,-7) ,-7) +transpose(transpose((transpose(X,4) +transpose((X+transpose(X,7) ) ,12) ) ,-7) ,4) ) +transpose(arpeggio(transpose(X,4) ) ,7) ) ,-5) ) ) +(((shuffle(echo(transpose((X+transpose(X,7) ) ,4) ,4,6) ) |(((((X+transpose(X,12) ) +transpose(X,12) ) +transpose(step(X,12) ,12) ) +transpose(X,-7) ) +transpose(shuffle(((((X+transpose(X,4) ) +transpose(X,7) ) |arpeggio((X+X) ) ) |((X|X) +transpose(X,4) ) ) ) ,12) ) ) +transpose((shuffle(arpeggio(step(transpose(X,-7) ,12) ) ) +transpose(((transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,4) +transpose(transpose(transpose(arpeggio(X) ,4) ,4) ,4) ) +transpose((echo(X,4,6) |(shuffle(transpose(X,-5) ) +transpose(transpose(transpose((X+transpose(X,7) ) ,4) ,-7) ,7) ) ) ,7) ) ,12) ) ,4) ) +transpose(transpose(transpose(transpose(echo(((echo(X,4,6) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,4,6) ,4) ,-5) ,-5) ,7) ) ) +transpose(step((echo(step((transpose(((X+transpose(X,7) ) +transpose(transpose(X,4) ,12) ) ,-5) |((transpose(X,-7) +transpose(X,12) ) |(X+transpose(transpose(X,-5) ,7) ) ) ) ,12) ,4,6) |transpose(((transpose(((step(X,12) +((X|transpose(X,-7) ) +transpose(transpose(step(X,12) ,4) ,7) ) ) +(((arpeggio(X) +(X|X) ) |shuffle(transpose((X|X) ,-7) ) ) +transpose((shuffle(X) +(X+transpose(X,12) ) ) ,-5) ) ) ,-5) +transpose((transpose(transpose(X,4) ,4) |(((X+X) +transpose(transpose(((X+transpose(X,7) ) |echo(X,4,6) ) ,-5) ,7) ) +transpose(transpose(X,4) ,-5) ) ) ,-7) ) +transpose((echo(echo((((shuffle(shuffle(X) ) +transpose(transpose((X|echo(X,4,6) ) ,-5) ,4) ) +transpose(transpose(echo(transpose(X,4) ,4,6) ,-7) ,7) ) |transpose(transpose((transpose(X,-7) |shuffle(X) ) ,-7) ,-5) ) ,4,6) ,4,6) |((transpose((X|X) ,-5) +shuffle(transpose((X+X) ,-5) ) ) +transpose(transpose((((X+X) +transpose(transpose(arpeggio(X) ,-7) ,-7) ) +transpose(((X+transpose(((X+X) |(X|X) ) ,4) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,7) ) ,12) ) ,-7) ,7) ) ) ,7) ) ,-7) ) ,12) ,12) ) ) ) ) ,-5) random seed used was 250217790
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |