|
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(((((transpose(((transpose(transpose(((arpeggio(arpeggio(X) ) |echo(transpose((X|X) ,-7) ,4,6) ) +transpose((((step(((X+X) +X) ,12) +transpose(transpose(((X+transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ,12) ) +transpose(step(X,12) ,4) ) +transpose((transpose(X,-5) +transpose(arpeggio(X) ,12) ) ,7) ) ,7) ) ,-5) ,4) +transpose(transpose(shuffle(transpose(((step(transpose(X,-5) ,12) +transpose(((X+X) +transpose(X,-5) ) ,4) ) +transpose((step(transpose(X,-5) ,12) +echo(transpose(transpose(X,-5) ,-7) ,4,6) ) ,12) ) ,-5) ) ,-7) ,4) ) +transpose(transpose(transpose(transpose(transpose(((echo(X,4,6) +transpose(X,7) ) +(transpose(arpeggio(X) ,4) +echo(X,4,6) ) ) ,4) ,-7) ,-7) ,4) ,7) ) ,-7) +transpose((((transpose(((transpose(arpeggio(X) ,-5) |step(echo(X,4,6) ,12) ) +transpose(transpose(transpose(transpose(X,4) ,4) ,-7) ,12) ) ,4) +transpose(transpose(transpose(arpeggio(X) ,-7) ,-5) ,12) ) +transpose(((((((X+X) |(X+transpose(X,7) ) ) +transpose(((echo(X,4,6) +transpose((X+X) ,12) ) |(echo(X,4,6) |((X+transpose(X,12) ) +(X|X) ) ) ) ,12) ) +transpose((transpose((X|X) ,-7) |((transpose(X,-7) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,4) ,7) ) ) ,12) ) |((shuffle(transpose(arpeggio(X) ,-5) ) +transpose(transpose(X,-7) ,7) ) +(step(X,12) |echo((X+transpose(transpose(echo(X,4,6) ,-7) ,12) ) ,4,6) ) ) ) +transpose(arpeggio(((X+X) +transpose(X,7) ) ) ,-5) ) ,4) ) +transpose((((step(transpose(((X+transpose(X,12) ) |transpose(X,-5) ) ,4) ,12) |echo((((shuffle(X) +X) +transpose((X|X) ,4) ) +transpose(shuffle((X+X) ) ,7) ) ,4,6) ) |transpose((echo(transpose(X,-5) ,4,6) +transpose(transpose(X,-5) ,7) ) ,-5) ) +transpose((transpose((echo(X,4,6) |X) ,-7) +transpose(((X+transpose(transpose(X,-5) ,12) ) +(transpose(X,-5) |X) ) ,12) ) ,7) ) ,7) ) ,4) ) +transpose((transpose(shuffle(step(shuffle(X) ,12) ) ,-5) +(((transpose(transpose((X|X) ,-7) ,4) +transpose(transpose(arpeggio(X) ,4) ,-5) ) +transpose(transpose((((step(X,12) +transpose(((X+transpose(X,12) ) +transpose(X,12) ) ,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(transpose((X+transpose(X,12) ) ,-5) ) ,7) ) ,4) ,12) ) +transpose(((((X|((((X+transpose(X,7) ) +transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(X,-5) ) ) |shuffle(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ) +transpose(((((((X+transpose(X,12) ) +transpose(transpose(X,4) ,7) ) +transpose((X+transpose(X,-7) ) ,4) ) +transpose(X,7) ) +transpose(transpose((X+transpose(transpose(X,-5) ,7) ) ,-7) ,7) ) +arpeggio((shuffle(X) |echo((X|X) ,4,6) ) ) ) ,7) ) |(transpose(X,4) +echo(((transpose(X,-7) +X) |(transpose(X,-5) |(X+transpose(X,7) ) ) ) ,4,6) ) ) ,12) ) ) ,7) ) |shuffle(transpose(((((((echo((X+X) ,4,6) +transpose(transpose(X,4) ,4) ) +transpose(step(transpose(X,4) ,12) ,7) ) +transpose(transpose((X|X) ,4) ,12) ) +transpose(shuffle(transpose(X,4) ) ,7) ) +transpose(transpose(step(echo(X,4,6) ,12) ,4) ,12) ) +transpose(echo(((transpose(X,-5) +transpose((X|X) ,7) ) +transpose(step((step(arpeggio(X) ,12) +((X+X) |X) ) ,12) ,7) ) ,4,6) ,7) ) ,4) ) ) +transpose(arpeggio(shuffle(((transpose(step((((transpose(transpose((shuffle(X) +transpose(transpose(X,-5) ,12) ) ,-5) ,-5) +transpose((X+transpose((shuffle(X) +transpose(X,7) ) ,12) ) ,4) ) +transpose(step((transpose(X,-5) +transpose((X+transpose(X,7) ) ,12) ) ,12) ,4) ) +transpose(echo(((transpose(transpose((step(X,12) +(X+transpose(X,12) ) ) ,4) ,-7) +transpose(((X+(step(X,12) |X) ) +((X+transpose(X,7) ) |arpeggio(X) ) ) ,4) ) +transpose(transpose(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) ,7) ) ,4,6) ,7) ) ,12) ,-5) |transpose((transpose(arpeggio((echo(transpose(X,-5) ,4,6) |(transpose(X,4) |transpose((X|X) ,4) ) ) ) ,-5) +transpose(step((((transpose(X,-5) +transpose(transpose(X,-5) ,7) ) +((transpose(X,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose(X,7) ) ) |transpose(transpose(X,-7) ,-5) ) ,12) ,12) ) ,-5) ) |((transpose(((step((transpose(X,-7) +X) ,12) +transpose((transpose(step(X,12) ,-5) |step(transpose(X,-5) ,12) ) ,12) ) +shuffle(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ) ,-5) |((((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |echo(step(arpeggio(X) ,12) ,4,6) ) +transpose(((transpose(arpeggio(X) ,-7) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,7) ) +transpose(transpose((X+transpose((echo(X,4,6) |X) ,7) ) ,4) ,12) ) ,7) ) ) +transpose(((echo(transpose(transpose(transpose(transpose(X,-5) ,4) ,-5) ,4) ,4,6) +transpose((((X+X) +transpose(transpose(((step((X+transpose(transpose(X,-7) ,7) ) ,12) +transpose(X,4) ) +(X+transpose(transpose((X+transpose(X,12) ) ,4) ,12) ) ) ,-5) ,4) ) +transpose(((echo(transpose(((transpose(X,4) +transpose(X,7) ) +transpose((X|X) ,12) ) ,-7) ,4,6) +transpose((transpose((transpose((X+transpose(X,7) ) ,-5) +transpose(X,4) ) ,-7) +transpose(shuffle((X+transpose(X,7) ) ) ,12) ) ,4) ) +transpose(transpose(transpose(shuffle((X|X) ) ,-7) ,4) ,7) ) ,7) ) ,4) ) +transpose(((transpose(X,4) |(X+transpose(X,7) ) ) +transpose(transpose(transpose(X,-5) ,-5) ,12) ) ,7) ) ,7) ) ) ) ) ,7) ) ,-5) +transpose(step((transpose((transpose(((X+transpose(((X+transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) |arpeggio(transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-5) ) ) ,4) |arpeggio(arpeggio(((echo(transpose(X,4) ,4,6) +(X|X) ) |(X+((X|X) |X) ) ) ) ) ) ,-5) +((shuffle((transpose((X+transpose(transpose(step(X,12) ,4) ,7) ) ,-7) +transpose(transpose((X+transpose(X,12) ) ,4) ,12) ) ) +transpose(shuffle(transpose(((shuffle(transpose(transpose(transpose(X,-5) ,-5) ,-5) ) +transpose(shuffle(X) ,-5) ) +transpose(((transpose(((X+transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) ,4) +transpose(shuffle((echo(transpose(X,-5) ,4,6) +transpose(((X+transpose(step(X,12) ,4) ) +transpose(((X|X) |(X+X) ) ,7) ) ,12) ) ) ,4) ) +transpose((transpose(step(X,12) ,-7) |step(step((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ,12) ) ,7) ) ,7) ) ,4) ) ,4) ) +transpose(transpose(shuffle(transpose(transpose(echo(transpose((transpose(X,-7) |((transpose(X,-5) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ) ,4) ,4,6) ,-7) ,-5) ) ,-7) ,12) ) ) ,12) ,4) ) +transpose(transpose(transpose((((transpose((arpeggio(arpeggio((((X+X) |(X+transpose(X,7) ) ) |transpose(X,-7) ) ) ) +transpose(((transpose(arpeggio((X+transpose(transpose(X,-7) ,12) ) ) ,-5) |(X|X) ) |transpose((transpose(transpose(X,-5) ,-5) |transpose(((X+transpose(X,12) ) +(X+transpose(X,12) ) ) ,-5) ) ,-7) ) ,12) ) ,-7) |transpose(transpose(((((((X|X) +X) +transpose((arpeggio(X) +step(X,12) ) ,4) ) +transpose(transpose(transpose((X+transpose(X,12) ) ,-5) ,4) ,7) ) +((step(X,12) +(echo(X,4,6) +transpose((X+X) ,7) ) ) +transpose(transpose(shuffle(X) ,4) ,7) ) ) +transpose((((shuffle(X) +transpose(X,4) ) +transpose(transpose(transpose(X,-5) ,-5) ,7) ) +transpose(((X+X) +X) ,4) ) ,4) ) ,-5) ,-5) ) |step(((echo(transpose(echo(arpeggio((X+X) ) ,4,6) ,-5) ,4,6) |(echo((X+X) ,4,6) +X) ) +transpose((transpose(echo(((X+transpose(X,7) ) +(X+transpose(X,12) ) ) ,4,6) ,4) +transpose((arpeggio((X+transpose((X|X) ,7) ) ) +transpose(echo(step(X,12) ,4,6) ,12) ) ,12) ) ,12) ) ,12) ) +transpose((transpose(transpose(transpose((transpose(X,-7) +transpose(transpose(X,4) ,12) ) ,4) ,-7) ,-5) |(echo(step(arpeggio((X+transpose(X,7) ) ) ,12) ,4,6) +transpose((step(transpose(transpose(X,-5) ,4) ,12) +(transpose((X+transpose(X,12) ) ,-5) +transpose(shuffle(transpose(X,4) ) ,12) ) ) ,7) ) ) ,12) ) ,-5) ,-7) ,7) ) random seed used was 196347193
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |