|
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 15 generations the expression "X" became this: | transpose((((transpose(transpose(echo((transpose(X,-7) +transpose(transpose(X,-7) ,12) ) ,4,6) ,-7) ,-7) |(((transpose(transpose(X,-5) ,4) +transpose((transpose((X|X) ,-7) +(((X+transpose(X,12) ) |transpose(X,-5) ) +transpose(X,12) ) ) ,12) ) +transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,7) ) +((echo(X,4,6) |((X+X) +transpose(transpose((X+X) ,-7) ,12) ) ) +(((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) |X) ) ) ) |((transpose(((step((transpose(X,-5) |(X+(X+X) ) ) ,12) +transpose(transpose(transpose(step(X,12) ,4) ,-7) ,12) ) +transpose((transpose(transpose((X+transpose(X,12) ) ,4) ,-5) |transpose(echo(X,4,6) ,4) ) ,12) ) ,-5) +transpose(step(((transpose(((transpose(echo((X|X) ,4,6) ,4) +transpose((arpeggio(X) +transpose(transpose(transpose(X,-5) ,-5) ,12) ) ,4) ) +transpose(arpeggio(((X+transpose(X,12) ) +X) ) ,7) ) ,-5) +((((arpeggio(X) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(arpeggio(X) ,12) ) |transpose(X,-5) ) ) +transpose((((transpose(X,-7) +transpose(echo(X,4,6) ,12) ) |shuffle((X+X) ) ) +(echo(transpose(X,4) ,4,6) +(((((X+transpose(X,4) ) +transpose(X,7) ) |(X|X) ) +transpose(X,4) ) +transpose((X+transpose((X|X) ,12) ) ,7) ) ) ) ,4) ) ,12) ,7) ) +transpose((transpose(shuffle(((echo(step(X,12) ,4,6) +transpose((transpose(arpeggio(arpeggio(X) ) ,4) +transpose(transpose((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-7) ,7) ) ,12) ) +transpose((transpose(shuffle((X+X) ) ,-7) +arpeggio(transpose(X,-5) ) ) ,7) ) ) ,-5) +transpose(step(transpose(echo((echo(X,4,6) +(X+(X+transpose(X,12) ) ) ) ,4,6) ,4) ,12) ,7) ) ,7) ) ) |transpose(arpeggio(transpose(transpose((transpose(step(echo(X,4,6) ,12) ,4) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) ,-7) ,-5) ) ,-7) ) ,-5) random seed used was 267422475
EXPR = (((arpeggio(((transpose(X,-5) +step(shuffle(transpose(((X+X) +transpose(step(X,12) ,7) ) ,4) ) ,12) ) +transpose(echo(((transpose(X,-7) +transpose(X,12) ) +((X|transpose(X,-7) ) +transpose((X+transpose(X,7) ) ,12) ) ) ,4,6) ,12) ) ) +(((echo(arpeggio((((X+transpose(X,4) ) +transpose((X+X) ,7) ) +transpose(echo(X,4,6) ,-7) ) ) ,4,6) +transpose((arpeggio(X) +transpose(((transpose(X,4) +transpose(X,12) ) +shuffle(shuffle((X+X) ) ) ) ,-5) ) ,12) ) +transpose(shuffle((((transpose(arpeggio(X) ,4) |arpeggio((X|X) ) ) |((transpose(X,4) +(X+X) ) +transpose(((X+transpose(X,7) ) +transpose(X,-5) ) ,12) ) ) +(((shuffle((X|X) ) +transpose(transpose((X|X) ,4) ,12) ) +transpose(shuffle(((X+transpose(transpose(X,4) ,4) ) +transpose(echo(X,4,6) ,7) ) ) ,4) ) +transpose(X,7) ) ) ) ,7) ) |((step(((transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,-5) +transpose(((step(X,12) +transpose(transpose(echo(X,4,6) ,4) ,7) ) |transpose(transpose(transpose(X,-5) ,-7) ,-7) ) ,4) ) +transpose((((shuffle((X|X) ) +echo(X,4,6) ) +arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose((((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,12) +transpose(transpose(arpeggio(echo(X,4,6) ) ,-7) ,-7) ) |transpose((transpose(((transpose(X,-5) +transpose((X+transpose(X,12) ) ,7) ) +transpose((X|X) ,-7) ) ,-5) +transpose(((((X+transpose(X,12) ) +transpose(X,4) ) |(X|X) ) +(shuffle(shuffle((X|X) ) ) |((transpose(transpose(X,4) ,-5) +transpose(echo(transpose(X,-7) ,4,6) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ) ,12) ) ,-5) ) ) ) +(((transpose(transpose((((step(X,12) +X) +transpose(X,-5) ) |arpeggio(((X|X) +transpose(shuffle(X) ,12) ) ) ) ,4) ,4) +transpose((step((arpeggio(transpose(X,-5) ) |(((X+transpose(X,4) ) +transpose(X,7) ) |X) ) ,12) +transpose(((X+transpose(X,7) ) +transpose((shuffle(X) +step(X,12) ) ,12) ) ,7) ) ,12) ) +transpose((transpose((arpeggio(((X+X) |(X+(X+transpose(X,7) ) ) ) ) +transpose(echo(((((X+X) |(transpose(X,-7) +transpose(X,7) ) ) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ,4,6) ,7) ) ,-5) |(transpose(transpose(transpose(X,-5) ,4) ,-5) +transpose((((transpose(X,-5) +(transpose(X,4) |(X+X) ) ) +transpose(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(step(X,12) ,-7) ,7) ) ,7) ) +transpose((echo(((arpeggio(X) +transpose(((X+transpose(X,12) ) |X) ,4) ) +transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,4,6) |(transpose(transpose(X,4) ,-5) +((step(X,12) |arpeggio(X) ) +transpose(arpeggio(X) ,12) ) ) ) ,7) ) ,7) ) ) ,7) ) +transpose(((step(((arpeggio((step(transpose(X,-7) ,12) +transpose(transpose(transpose(X,4) ,4) ,12) ) ) +transpose(transpose(transpose((X|step(X,12) ) ,-7) ,-5) ,4) ) +transpose(transpose(echo(X,4,6) ,-7) ,7) ) ,12) +transpose(echo((((step(X,12) +transpose(((X+transpose(arpeggio(X) ,7) ) +X) ,12) ) +transpose((transpose((transpose(X,4) +transpose(transpose(echo(X,4,6) ,-5) ,12) ) ,-5) +transpose((transpose(X,-5) +transpose(arpeggio(transpose(X,-5) ) ,7) ) ,7) ) ,12) ) +transpose(arpeggio(transpose((X+X) ,4) ) ,4) ) ,4,6) ,4) ) +transpose(arpeggio(shuffle(transpose((X+transpose(transpose(transpose(transpose(X,-5) ,-5) ,-7) ,12) ) ,4) ) ) ,7) ) ,12) ) ) +transpose((shuffle(transpose(((((transpose((X+transpose(X,12) ) ,4) +transpose(((X|X) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) +transpose(shuffle((((X+transpose(X,4) ) +transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,7) ) +transpose(echo(echo(echo(X,4,6) ,4,6) ,4,6) ,4) ) +transpose(X,7) ) ,-5) ) +transpose(arpeggio(((((transpose((echo(X,4,6) |X) ,-7) |shuffle(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ) +transpose(transpose(((transpose(X,4) |arpeggio(X) ) +transpose((X+transpose(X,12) ) ,7) ) ,-7) ,12) ) +transpose(arpeggio(shuffle((shuffle(X) +transpose((X|X) ,7) ) ) ) ,7) ) +transpose((arpeggio(transpose(transpose(transpose(X,4) ,4) ,-5) ) |echo(echo(((transpose(transpose(X,4) ,4) +transpose(transpose(transpose((X|transpose(X,-7) ) ,-5) ,-5) ,4) ) +transpose(transpose(((transpose(arpeggio(X) ,-7) +transpose((transpose(X,4) +X) ,4) ) +transpose((((X|X) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,7) ) ,4) ,7) ) ,4,6) ,4,6) ) ,7) ) ) ,4) ) ,-5) ) random seed used was 0
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |