|
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(echo((step((step(((((step(((((X+transpose(X,12) ) +transpose(step(X,12) ,4) ) +transpose(transpose(X,4) ,7) ) |X) ,12) +(transpose(transpose(X,-7) ,-7) +transpose(transpose((X|X) ,-7) ,-7) ) ) +transpose(arpeggio((arpeggio(transpose(echo(X,4,6) ,-5) ) +transpose((arpeggio(X) |(X+X) ) ,7) ) ) ,12) ) +transpose(echo((transpose(step(X,12) ,-7) +transpose((((X+transpose(X,12) ) +(X|X) ) |X) ,12) ) ,4,6) ,12) ) +shuffle(shuffle(transpose((transpose(step(transpose(X,-7) ,12) ,4) +transpose(transpose(arpeggio(X) ,4) ,4) ) ,4) ) ) ) ,12) |((transpose(transpose(transpose((transpose(X,4) +transpose(transpose((X+X) ,-7) ,7) ) ,-7) ,-5) ,-7) +((step(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +((X+transpose(X,12) ) |(X+(X|X) ) ) ) ,12) +transpose((transpose((transpose(transpose(X,-5) ,4) +transpose((transpose(X,-7) +(X+X) ) ,12) ) ,-7) +(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,12) ) ,-7) |(((shuffle(arpeggio(X) ) |(X+transpose((X+X) ,12) ) ) |transpose(transpose((X+X) ,-7) ,4) ) +transpose(((X+X) |(transpose(X,4) |X) ) ,7) ) ) ) ,4) ) +transpose((transpose(arpeggio(shuffle((X+transpose(X,7) ) ) ) ,4) +transpose((echo(X,4,6) +transpose((arpeggio((X+transpose(X,7) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) ,-7) ) ,7) ) ) +transpose(transpose(transpose((transpose((((X+transpose(X,7) ) +transpose(step(X,12) ,7) ) +transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ) ,4) +(transpose(transpose((X+(X|X) ) ,4) ,-7) +transpose((((X|(X|X) ) +transpose(echo(transpose(X,-7) ,4,6) ,4) ) +transpose(transpose(transpose(X,-7) ,-7) ,7) ) ,-7) ) ) ,-5) ,4) ,12) ) ) ,12) +transpose((transpose(shuffle(transpose((X+transpose(X,12) ) ,-7) ) ,4) |transpose(transpose((transpose(transpose(shuffle(transpose(X,4) ) ,-5) ,-7) |((((X|X) +transpose(transpose((X|X) ,-7) ,4) ) +transpose(arpeggio((transpose(X,4) +step(X,12) ) ) ,7) ) |(shuffle(transpose((X+X) ,-5) ) |(X|transpose(X,-5) ) ) ) ) ,-5) ,-7) ) ,-7) ) ,4,6) ,4) +((((transpose(transpose(arpeggio(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |transpose((X+transpose(X,12) ) ,4) ) |transpose(((X+transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) ,-5) ) ,4) ) ,-7) ,-5) +(step(transpose(((((transpose((X+X) ,-5) +transpose(shuffle(X) ,12) ) +transpose(echo(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4,6) ,4) ) +transpose(((shuffle(transpose(X,4) ) +transpose(((X+transpose(X,7) ) +X) ,4) ) |transpose((X+X) ,-5) ) ,7) ) +transpose(transpose((arpeggio(transpose(shuffle(X) ,-5) ) +transpose(step(((X|X) +X) ,12) ,12) ) ,-5) ,12) ) ,-7) ,12) +transpose(transpose(((transpose((shuffle((X+transpose(X,7) ) ) |X) ,-5) +transpose(echo((transpose(X,-7) +(X+X) ) ,4,6) ,12) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,4) ,-5) ) ) |((transpose((step((step(transpose(X,4) ,12) +transpose((X+transpose((X|step(X,12) ) ,7) ) ,12) ) ,12) +transpose(shuffle(shuffle(X) ) ,7) ) ,4) |echo(arpeggio(transpose(transpose((X+transpose(X,12) ) ,4) ,-5) ) ,4,6) ) |(transpose(transpose(transpose(((transpose(transpose((echo(X,4,6) |(X|X) ) ,4) ,-7) +transpose(step(transpose(X,4) ,12) ,4) ) +transpose((transpose(((X+transpose(X,12) ) |X) ,-5) +transpose((X+transpose(X,12) ) ,12) ) ,7) ) ,-7) ,-5) ,-5) |((transpose((((shuffle(transpose(X,4) ) +transpose(transpose(transpose(X,4) ,4) ,12) ) +(((X+X) +transpose((X+transpose((X+transpose(X,12) ) ,4) ) ,4) ) +transpose(echo((X|X) ,4,6) ,7) ) ) |shuffle((transpose((X|X) ,-5) |((X|transpose(X,-7) ) +transpose((transpose(X,4) +transpose(transpose(X,-5) ,12) ) ,7) ) ) ) ) ,-7) +transpose(arpeggio(arpeggio((X+(X+X) ) ) ) ,7) ) +(transpose(transpose(transpose(((X|X) +transpose(shuffle((X+transpose(X,12) ) ) ,12) ) ,-5) ,-5) ,4) +transpose(shuffle(((((shuffle(X) +transpose((X|X) ,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,-5) ) +transpose(echo((arpeggio(X) +(transpose((X+transpose(X,12) ) ,4) +transpose(transpose(X,-5) ,7) ) ) ,4,6) ,7) ) +(transpose(transpose((X|X) ,4) ,-5) |(((X|(echo(X,4,6) |step(X,12) ) ) +step(step(X,12) ,12) ) |transpose(transpose((arpeggio(echo(X,4,6) ) +transpose(X,12) ) ,-5) ,-7) ) ) ) ) ,12) ) ) ) ) ) +transpose(transpose((transpose(step(step(transpose(transpose((transpose(echo(transpose(X,4) ,4,6) ,-7) +transpose(X,12) ) ,4) ,-7) ,12) ,12) ,-7) |(transpose(((((X+X) |transpose(X,4) ) +transpose(X,-5) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) |transpose((transpose(arpeggio(transpose(X,4) ) ,-7) +transpose(transpose(step((X+X) ,12) ,4) ,12) ) ,4) ) ) ,-7) ,-7) ) +transpose((shuffle(transpose(transpose(echo((((arpeggio((transpose(arpeggio(arpeggio(X) ) ,-5) |(transpose(transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ,4) ,-7) +transpose(((echo(X,4,6) +transpose(X,12) ) +transpose(((X+X) |((X+transpose(X,12) ) +(X|X) ) ) ,12) ) ,12) ) ) ) |(((arpeggio((echo((((X+X) +transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) ,4,6) |transpose(transpose((X|X) ,-7) ,-7) ) ) |(((transpose(echo(transpose(X,4) ,4,6) ,-5) +transpose((X+transpose(X,7) ) ,-7) ) +transpose(echo((transpose((X+X) ,-7) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,4,6) ,4) ) +transpose(echo((transpose(X,4) +transpose(step((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ,12) ) ,4,6) ,7) ) ) +transpose((step(transpose(transpose((transpose(X,4) +transpose((X+X) ,-5) ) ,-7) ,4) ,12) +((X|((X+transpose(X,12) ) +transpose(transpose(X,4) ,7) ) ) +transpose((transpose((((shuffle(X) +transpose((X|X) ,4) ) +transpose(X,7) ) +shuffle((X|X) ) ) ,4) |(transpose(transpose(X,-7) ,4) |transpose(((X+transpose(transpose(X,4) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ) ) ,7) ) ) ,4) ) +transpose(transpose((transpose(transpose(X,4) ,-5) |((X+transpose(X,7) ) +X) ) ,-7) ,7) ) ) +transpose(transpose(((shuffle((((X+transpose(echo(transpose(X,4) ,4,6) ,4) ) +transpose(X,7) ) +transpose((X+(X+X) ) ,4) ) ) +transpose(transpose((X+X) ,4) ,12) ) +transpose(echo(transpose((X+transpose(X,12) ) ,-7) ,4,6) ,12) ) ,4) ,12) ) |transpose(((step(X,12) +transpose(transpose(((((transpose(X,-5) +transpose(X,7) ) +transpose(shuffle((X|X) ) ,4) ) +transpose(X,7) ) +transpose((X+transpose(transpose((X+transpose(X,12) ) ,4) ,12) ) ,7) ) ,-7) ,4) ) +transpose((step(transpose(((X+X) +echo(step(X,12) ,4,6) ) ,4) ,12) +transpose(step(transpose((((((X+transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) +transpose((X|X) ,4) ) +transpose((step(X,12) +transpose(X,7) ) ,7) ) |(transpose(X,-5) +(X+transpose(X,12) ) ) ) ,4) ,12) ,12) ) ,7) ) ,4) ) ,4,6) ,-7) ,4) ) +transpose(echo(step(((transpose((transpose(echo((transpose(transpose(X,-5) ,-5) +(transpose((X|X) ,4) |X) ) ,4,6) ,4) +transpose((transpose(transpose(((transpose(X,-7) |((echo(X,4,6) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ) +transpose((transpose(X,-5) +X) ,12) ) ,-7) ,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,12) ) ,-5) +transpose(((transpose((X+transpose(X,12) ) ,-7) +transpose(shuffle(arpeggio((X+transpose(X,7) ) ) ) ,4) ) +transpose(transpose((echo(((echo((X+transpose(X,12) ) ,4,6) +(X+X) ) |transpose((X+transpose(X,12) ) ,-7) ) ,4,6) +transpose(transpose(transpose(transpose((X|X) ,4) ,-5) ,-5) ,7) ) ,4) ,7) ) ,4) ) +transpose(transpose(transpose(transpose((echo((echo(((step(X,12) +transpose(X,7) ) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,4,6) +transpose((X+transpose(transpose((X+X) ,-5) ,7) ) ,12) ) ,4,6) +transpose(arpeggio(arpeggio(X) ) ,-5) ) ,4) ,-5) ,4) ,7) ) ,12) ,4,6) ,12) ) ,7) ) ) random seed used was 168188887
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |