|
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 19 generations the expression "X" became this: | (((((echo((shuffle(transpose((X+transpose(transpose(X,-5) ,12) ) ,-5) ) +(transpose((transpose(((X|X) +((X+X) +X) ) ,-5) |transpose((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,-7) ) ,-7) ) ,-7) |transpose((transpose((X+X) ,-5) +transpose(((transpose(shuffle(X) ,-7) +transpose(((echo((X+transpose(X,7) ) ,4,6) +transpose((X+X) ,4) ) +transpose((X+X) ,7) ) ,4) ) +transpose(((transpose(X,-7) +transpose(X,-7) ) +((X|X) +transpose(X,7) ) ) ,7) ) ,-7) ) ,4) ) ) ,4,6) +((transpose(transpose(transpose(transpose(echo(X,4,6) ,-7) ,-5) ,-7) ,-7) +transpose((((step((echo(X,4,6) +transpose(transpose(X,-5) ,7) ) ,12) +transpose((transpose(((X+X) +transpose(((X+X) |transpose(X,-7) ) ,-7) ) ,-5) +transpose(transpose(((X+X) |(shuffle(X) +transpose(X,12) ) ) ,-5) ,7) ) ,12) ) +transpose(transpose(echo(transpose((X+X) ,-7) ,4,6) ,4) ,-7) ) +(transpose(transpose((transpose(transpose(transpose((X+X) ,4) ,-7) ,4) +shuffle(transpose(((X+transpose(X,7) ) |transpose(X,-7) ) ,-7) ) ) ,-7) ,4) |((transpose((transpose(transpose((X|X) ,4) ,-7) +transpose(transpose(((transpose(X,-5) |transpose(X,-7) ) |X) ,4) ,7) ) ,-7) +transpose((transpose(((transpose(X,-7) +X) +arpeggio(X) ) ,-7) +transpose(step(arpeggio(X) ,12) ,12) ) ,4) ) +transpose((((transpose(transpose((transpose(X,-7) |(X+transpose(transpose(transpose(X,4) ,-5) ,7) ) ) ,4) ,-5) +transpose(shuffle(transpose(transpose(transpose(X,4) ,-7) ,-5) ) ,4) ) +transpose((transpose((transpose(transpose(X,-5) ,4) +transpose((step(X,12) +echo(arpeggio(X) ,4,6) ) ,12) ) ,-5) +((echo(X,4,6) +transpose((((X|X) +transpose(transpose(X,-5) ,12) ) |transpose((X+transpose(X,12) ) ,-7) ) ,4) ) +transpose((transpose(transpose(X,-5) ,-7) |(((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ,7) ) ) ,7) ) +transpose(echo(transpose(transpose(X,-7) ,-5) ,4,6) ,12) ) ,7) ) ) ) ,4) ) +transpose(arpeggio(shuffle((step(transpose(echo(transpose(X,-5) ,4,6) ,-7) ,12) +transpose(transpose(arpeggio(X) ,-7) ,-5) ) ) ) ,7) ) ) +transpose(transpose(transpose(transpose((transpose(transpose((((transpose(step(echo(X,4,6) ,12) ,-5) +transpose(transpose((X|X) ,4) ,4) ) +transpose((transpose((X+transpose(X,7) ) ,4) +transpose(X,-7) ) ,7) ) |((X+X) +((X+transpose(X,7) ) |X) ) ) ,4) ,-5) +step(transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,4) ,12) ) ,-7) ,4) ,-5) ,7) ) +transpose(arpeggio(transpose(((((transpose(shuffle((((X+X) +transpose((X+X) ,4) ) +transpose((X|(X|X) ) ,7) ) ) ,-7) |(((transpose(X,4) |transpose(echo(X,4,6) ,-5) ) |transpose(transpose(((X|X) +shuffle(X) ) ,4) ,4) ) |((transpose(((X+transpose(X,7) ) +transpose((X+X) ,12) ) ,4) +transpose((((X+transpose(X,7) ) +transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) ,12) ) +transpose(transpose(((echo(X,4,6) +transpose(transpose(X,-5) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,-5) ,7) ) ) ) |(transpose(step((((X+transpose(X,12) ) +transpose(arpeggio(X) ,4) ) +transpose(transpose(X,4) ,7) ) ,12) ,-7) +transpose(transpose(transpose(X,-5) ,4) ,4) ) ) |(echo((transpose(transpose(transpose(transpose(X,-5) ,4) ,-7) ,4) +transpose(((X+X) |X) ,7) ) ,4,6) |transpose((arpeggio(((step(X,12) |transpose(X,-5) ) |X) ) +(((arpeggio(transpose(X,4) ) +transpose((((X+X) +transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(transpose(X,4) ,4) ) ) ,-7) ) ) |step((step(step((X|transpose((X|X) ,4) ) ,12) ,12) +transpose((transpose(X,-5) +transpose(transpose(X,4) ,12) ) ,4) ) ,12) ) ,-5) ) ,12) ) +transpose(echo((transpose(((transpose((transpose(((X+step((X+X) ,12) ) +(step(transpose(X,-5) ,12) |transpose((X+transpose(X,7) ) ,-5) ) ) ,4) |transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,4) ) ,-7) +transpose((transpose(shuffle((X+transpose(X,7) ) ) ,4) |(transpose(echo((X+X) ,4,6) ,-5) +transpose(transpose((transpose(shuffle(shuffle(X) ) ,-5) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(transpose(X,4) ,-5) ,4) ) +transpose(transpose(shuffle(X) ,4) ,7) ) ,12) ) ,-5) ,12) ) ) ,4) ) +transpose((transpose(((transpose(transpose((X+transpose(X,7) ) ,-7) ,4) +transpose(arpeggio(transpose((X+X) ,-7) ) ,7) ) +((X+transpose(echo(X,4,6) ,12) ) +echo(transpose(X,-5) ,4,6) ) ) ,-7) +transpose(((echo(transpose(transpose(X,-7) ,-7) ,4,6) |(shuffle(echo(X,4,6) ) |((X+X) +transpose((X+transpose((X|X) ,12) ) ,7) ) ) ) +step((shuffle(arpeggio(transpose(X,-5) ) ) +transpose(transpose(((X+X) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) ,-7) ,7) ) ,12) ) ,7) ) ,7) ) ,-7) |transpose(transpose(transpose((transpose((((transpose(arpeggio(X) ,-5) +transpose(X,4) ) +transpose(((X+X) +transpose(X,12) ) ,4) ) +transpose(arpeggio(transpose(transpose(X,-7) ,-7) ) ,7) ) ,-5) +(echo((((X+transpose(X,7) ) +(X+X) ) +transpose((((X+X) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,4,6) +transpose((((transpose(arpeggio((X+transpose(X,12) ) ) ,-5) +((((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) |transpose(transpose(X,-5) ,-5) ) ) |(transpose(((X+transpose(X,7) ) +transpose(X,4) ) ,4) +transpose(X,12) ) ) |(shuffle(transpose(X,-5) ) +step((X+transpose(transpose(X,-5) ,7) ) ,12) ) ) ,7) ) ) ,4) ,4) ,-5) ) ,4,6) ,4) ) +transpose(transpose(echo(shuffle(step((echo((((transpose(transpose(X,-5) ,-7) |(transpose((shuffle(X) |X) ,4) +transpose((echo(X,4,6) |(X|X) ) ,12) ) ) +transpose(transpose((((X+X) +X) +transpose(arpeggio(arpeggio(X) ) ,12) ) ,4) ,7) ) +transpose(step(echo(X,4,6) ,12) ,7) ) ,4,6) +transpose(step(echo(transpose((X|X) ,4) ,4,6) ,12) ,12) ) ,12) ) ,4,6) ,4) ,7) ) random seed used was 12467125
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |