|
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((echo(((arpeggio(transpose((transpose((transpose((step(transpose(X,4) ,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,-7) +((shuffle(X) |transpose(X,-7) ) +transpose(X,-5) ) ) ,-5) +echo(shuffle((((transpose(X,-7) +transpose(X,12) ) |(X+transpose(X,7) ) ) +((X|transpose(X,4) ) +transpose((X|(X|X) ) ,7) ) ) ) ,4,6) ) ,-5) ) +transpose(transpose(transpose(echo(transpose((transpose(echo((arpeggio(X) |(X+transpose(X,7) ) ) ,4,6) ,-7) +step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,12) ) ,-5) ,4,6) ,-7) ,4) ,4) ) +transpose(((transpose(((X+(X|transpose(X,4) ) ) +transpose(transpose(shuffle(arpeggio(X) ) ,4) ,7) ) ,4) +transpose(shuffle((transpose((transpose((transpose(X,4) +transpose((X|X) ,7) ) ,-7) +(echo(shuffle(X) ,4,6) +transpose(echo((X+transpose(X,12) ) ,4,6) ,12) ) ) ,4) +(transpose(transpose(transpose(transpose(X,-5) ,-5) ,-7) ,-7) +transpose(((((X+step(X,12) ) |(X+transpose((X+transpose(X,7) ) ,12) ) ) |transpose(echo((X+transpose(X,7) ) ,4,6) ,-5) ) |(arpeggio(X) |echo(X,4,6) ) ) ,12) ) ) ) ,12) ) +transpose(transpose(transpose(transpose((arpeggio(echo(((shuffle((X+transpose(X,7) ) ) |transpose((X+transpose(X,7) ) ,4) ) |((X+transpose(X,7) ) |X) ) ,4,6) ) +((echo(step(echo(X,4,6) ,12) ,4,6) |(((X+transpose(X,12) ) +transpose(((transpose(X,-7) +transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) ,4) ) +transpose(((shuffle(X) +transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ,7) ) ) +transpose(transpose(step(arpeggio(X) ,12) ,-5) ,12) ) ) ,4) ,4) ,-5) ,12) ) ,7) ) ,4,6) |(((((echo(((transpose(transpose((X+transpose(X,12) ) ,-5) ,4) +transpose(arpeggio(X) ,12) ) |shuffle((transpose(arpeggio(X) ,4) |arpeggio((((X+X) +transpose(transpose(X,-5) ,4) ) +transpose((transpose(X,-5) +(X+transpose(X,12) ) ) ,7) ) ) ) ) ) ,4,6) |transpose((shuffle(arpeggio((transpose(X,4) |X) ) ) |(((transpose((X+X) ,-5) +transpose(transpose(transpose(X,4) ,4) ,12) ) |(X+transpose(X,7) ) ) +transpose(transpose(transpose((X|X) ,-5) ,4) ,7) ) ) ,4) ) |(((((X|step(X,12) ) +transpose(transpose((((X+X) +transpose(shuffle(X) ,7) ) +X) ,-5) ,7) ) +(transpose(X,-5) |transpose(X,-7) ) ) +transpose((shuffle((transpose((X+transpose(X,7) ) ,-5) +transpose((arpeggio(X) +X) ,7) ) ) |(transpose(echo((X|X) ,4,6) ,4) +transpose(((transpose(X,-5) +(X|X) ) +transpose(X,12) ) ,12) ) ) ,12) ) |(((arpeggio(((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose((step(X,12) |echo(X,4,6) ) ,4) ) +transpose((arpeggio(shuffle(X) ) +transpose(X,12) ) ,7) ) ) +echo(arpeggio(transpose(echo(transpose(X,4) ,4,6) ,4) ) ,4,6) ) +transpose(echo(transpose((arpeggio(X) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ,4,6) ,4) ) +transpose(transpose(echo((transpose(transpose((X|X) ,4) ,-7) +transpose(((transpose(X,-7) +transpose(X,7) ) |X) ,12) ) ,4,6) ,-7) ,7) ) ) ) +transpose(echo(transpose(step(echo((shuffle(transpose(transpose(step(shuffle(X) ,12) ,-5) ,-5) ) +shuffle((transpose(X,4) +((X+X) +transpose(step(X,12) ,7) ) ) ) ) ,4,6) ,12) ,-7) ,4,6) ,4) ) +transpose(((arpeggio((step((transpose(transpose(X,4) ,4) |step((X|X) ,12) ) ,12) +transpose(step(transpose(((X|X) +transpose(X,7) ) ,4) ,12) ,7) ) ) |transpose((transpose((X|X) ,-7) |((step((transpose(X,-7) +transpose(X,4) ) ,12) +transpose(((X+transpose((X|X) ,12) ) +shuffle(X) ) ,4) ) +transpose(shuffle(transpose(transpose(X,-5) ,-7) ) ,7) ) ) ,4) ) +((step(echo(transpose((echo(transpose(X,-5) ,4,6) +transpose((X+(X+X) ) ,-7) ) ,-7) ,4,6) ,12) +transpose(((((transpose(X,4) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) |(transpose(X,-7) +((X+X) +echo(X,4,6) ) ) ) +transpose(((echo(X,4,6) |(X+transpose(X,7) ) ) +(transpose(X,-7) |X) ) ,-5) ) ,7) ) +transpose((transpose(transpose(transpose(transpose(step(X,12) ,-7) ,-5) ,-5) ,4) |(shuffle(transpose(step(X,12) ,4) ) +transpose(X,12) ) ) ,-5) ) ) ,7) ) |(((shuffle((transpose((transpose(X,-7) +transpose(transpose(X,-7) ,12) ) ,4) |transpose(step(step(transpose(transpose(X,4) ,-5) ,12) ,12) ,4) ) ) +transpose(step(arpeggio(transpose(transpose(X,4) ,4) ) ,12) ,4) ) +transpose((transpose(transpose((step((shuffle(X) |transpose(X,-7) ) ,12) +transpose(transpose(shuffle((X|X) ) ,4) ,12) ) ,-5) ,4) +arpeggio(((step(transpose(step(X,12) ,-5) ,12) +transpose((transpose((X|X) ,4) +transpose((X+transpose((X+X) ,12) ) ,12) ) ,12) ) |(((echo(X,4,6) +(X+transpose(X,7) ) ) +transpose((transpose(echo(step(X,12) ,4,6) ,-7) +transpose((X+transpose(X,4) ) ,12) ) ,4) ) +transpose((step(transpose(X,-5) ,12) +transpose(((step((X+X) ,12) +transpose(X,-5) ) +transpose(((arpeggio(X) +transpose(X,4) ) +transpose(X,7) ) ,4) ) ,7) ) ,7) ) ) ) ) ,7) ) |transpose(((step(((X+X) +X) ,12) +transpose((shuffle(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,-5) ) +transpose(transpose(shuffle(X) ,-7) ,4) ) ,4) ) +transpose(transpose(arpeggio((((transpose(X,-5) +transpose(echo(X,4,6) ,4) ) +transpose((X+(X+transpose(X,7) ) ) ,7) ) +((X+transpose((echo(X,4,6) +transpose(transpose((X+transpose(X,7) ) ,4) ,12) ) ,4) ) +transpose((((X+X) +transpose(X,4) ) +transpose((X+X) ,7) ) ,7) ) ) ) ,4) ,7) ) ,-7) ) ) ) ,4,6) +(echo(shuffle(arpeggio((((echo(X,4,6) |transpose(arpeggio(arpeggio(transpose(X,-5) ) ) ,4) ) +((transpose(echo(transpose((X|X) ,-5) ,4,6) ,4) +transpose(((((echo(X,4,6) +transpose(X,12) ) +transpose(((X|X) +(transpose(X,4) +transpose((X+transpose(X,12) ) ,12) ) ) ,4) ) +transpose(transpose((((shuffle(X) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(((transpose(X,4) +transpose((X|X) ,4) ) +transpose((X|X) ,7) ) ,7) ) ,-7) ,7) ) |echo((X+arpeggio(X) ) ,4,6) ) ,4) ) +transpose(transpose(echo((transpose(X,-5) +transpose(X,-5) ) ,4,6) ,-7) ,7) ) ) +transpose(step(transpose((transpose(shuffle(echo(X,4,6) ) ,4) +transpose(echo((X|transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) ,-5) ) ,4,6) ,7) ) ,-7) ,12) ,7) ) ) ) ,4,6) |transpose(arpeggio(transpose((arpeggio(transpose((echo(((X+transpose(X,12) ) |X) ,4,6) +shuffle((X+transpose((transpose(X,-7) +transpose((X+X) ,7) ) ,7) ) ) ) ,-5) ) |(transpose(((echo(X,4,6) +transpose((X+transpose(X,12) ) ,4) ) +(transpose(transpose((X|X) ,-5) ,-5) +transpose(X,4) ) ) ,-5) +transpose(((((X+(X|X) ) |(X+transpose(X,7) ) ) +(X+X) ) +transpose((arpeggio(transpose((echo(echo(X,4,6) ,4,6) +transpose(step(transpose(X,-7) ,12) ,7) ) ,4) ) +transpose((transpose(((((arpeggio(X) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) +transpose(((X+X) +transpose(transpose(X,4) ,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) +((transpose(shuffle(X) ,4) +transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) +(transpose(X,-5) |transpose(X,-5) ) ) ) ,12) ) ,7) ) ,7) ) ) ,-7) ) ,4) ) ) random seed used was 217856130
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |