|
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 14 generations the expression "X" became this: | (step(((transpose(shuffle(shuffle(step(shuffle(step(X,12) ) ,12) ) ) ,-5) |(((arpeggio(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +((echo((X|X) ,4,6) +transpose((step(X,12) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) ,4) ) +transpose(((shuffle(X) +transpose(X,4) ) +transpose(X,7) ) ,7) ) ) |transpose(arpeggio(X) ,-5) ) +arpeggio(arpeggio(transpose(((X+transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-7) ) ) ) ) +transpose(transpose(step(shuffle(step(shuffle((transpose(shuffle(echo(transpose(X,4) ,4,6) ) ,4) +transpose(arpeggio(shuffle(step(X,12) ) ) ,12) ) ) ,12) ) ,12) ,4) ,7) ) ,12) +transpose((transpose(echo((((X+transpose(step(X,12) ,7) ) +echo(X,4,6) ) |step((step((X+transpose(X,7) ) ,12) +echo(transpose(X,-5) ,4,6) ) ,12) ) ,4,6) ,-7) |((echo(arpeggio(transpose(echo(transpose(shuffle(shuffle(arpeggio((X+(X+transpose(echo(X,4,6) ,12) ) ) ) ) ) ,4) ,4,6) ,4) ) ,4,6) +transpose(((transpose(transpose(((X|arpeggio(transpose(X,-5) ) ) +transpose(X,-7) ) ,4) ,4) +transpose((((step(echo(X,4,6) ,12) +transpose(((step(step(X,12) ,12) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,7) ) +(transpose((X+transpose(X,12) ) ,-5) |((X+transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) ) ,12) ) +transpose(((shuffle((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) +transpose(((arpeggio(X) +X) |(X+X) ) ,4) ) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,4) ) +transpose((((transpose(((X|X) +transpose(X,12) ) ,4) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose((transpose(X,-7) +transpose((X+transpose(X,7) ) ,12) ) ,7) ) ,7) ) +step((X+((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) +transpose((echo(((echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(arpeggio((X+transpose(X,12) ) ) ,7) ) ,4,6) +transpose(arpeggio(echo(X,4,6) ) ,7) ) ,12) ) ,7) ) ,12) ) +transpose(((arpeggio(step(transpose(shuffle(X) ,4) ,12) ) +transpose(arpeggio(echo(arpeggio(((transpose(X,-7) +(X+transpose(X,12) ) ) +transpose(step(X,12) ,7) ) ) ,4,6) ) ,7) ) |transpose(arpeggio((step(echo(transpose((((X+X) +transpose(echo(X,4,6) ,4) ) +transpose(arpeggio(X) ,7) ) ,4) ,4,6) ,12) +transpose((echo((step(arpeggio(X) ,12) +transpose(((step((X+transpose(X,7) ) ,12) +transpose(((X+transpose(X,12) ) +transpose(shuffle(X) ,7) ) ,4) ) +transpose((X|X) ,7) ) ,12) ) ,4,6) +arpeggio((((X+transpose(X,12) ) +transpose((((transpose(X,-5) +transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,7) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(((X+X) +transpose((X|X) ,7) ) ,7) ) ) ) ,7) ) ) ,-7) ) ,7) ) ,4) ) +transpose((step(echo((X+transpose(X,7) ) ,4,6) ,12) +transpose(step(X,12) ,7) ) ,7) ) ) ,7) ) random seed used was 160213923
EXPR = step(shuffle(((transpose(((((((step(X,12) +transpose((((X|X) +transpose(X,4) ) +transpose(step(X,12) ,7) ) ,4) ) +transpose(X,7) ) +transpose(((shuffle(X) +transpose(X,7) ) +transpose((transpose(X,4) +X) ,12) ) ,7) ) +transpose((shuffle(X) |step(transpose(shuffle(X) ,-7) ,12) ) ,4) ) +transpose((X+transpose(arpeggio(echo(X,4,6) ) ,7) ) ,7) ) |(((echo((((echo(X,4,6) +transpose((echo(X,4,6) +transpose(X,7) ) ,7) ) +transpose(X,4) ) +transpose((((X+transpose(X,12) ) |X) +transpose((X|transpose(X,-5) ) ,7) ) ,7) ) ,4,6) +echo(arpeggio(arpeggio(X) ) ,4,6) ) +transpose((shuffle(((transpose((arpeggio(X) +transpose(X,12) ) ,-7) +transpose(arpeggio((step(X,12) +transpose(X,7) ) ) ,4) ) +transpose((step(X,12) +transpose(echo(X,4,6) ,12) ) ,7) ) ) +transpose(step((X+transpose(X,7) ) ,12) ,12) ) ,12) ) +transpose((echo((echo(X,4,6) +transpose((X+transpose((X+transpose(X,7) ) ,7) ) ,12) ) ,4,6) +transpose(transpose(((((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) |(X+transpose(X,7) ) ) |((transpose(X,-7) |(X+transpose(X,7) ) ) +(((X+transpose(X,7) ) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ) ,-5) ,7) ) ,7) ) ) ,4) +transpose(((arpeggio((((transpose(arpeggio(X) ,-5) +transpose(((transpose(X,-7) +transpose((X|X) ,4) ) +transpose(step(echo(X,4,6) ,12) ,7) ) ,7) ) +transpose((shuffle((X+transpose(step(X,12) ,7) ) ) |step(echo(X,4,6) ,12) ) ,4) ) +transpose(step(((X+transpose(X,12) ) +transpose(step(X,12) ,12) ) ,12) ,7) ) ) +transpose((((step((transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) ,4) +transpose(transpose(arpeggio(((X+transpose((X+X) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ,-5) ,12) ) ,12) +transpose(transpose(echo(((((X+transpose(X,7) ) +shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,4) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,7) ) ,4,6) ,-5) ,4) ) +transpose(((((X+transpose(X,7) ) |X) +transpose(arpeggio((transpose(X,-7) +transpose(transpose(X,-7) ,7) ) ) ,7) ) |(transpose(transpose(X,4) ,-7) |transpose((X+transpose(X,7) ) ,-5) ) ) ,7) ) +transpose(step(transpose(transpose((transpose(X,-7) +step(X,12) ) ,-7) ,-7) ,12) ,7) ) ,4) ) +transpose(echo((echo(((X+transpose(arpeggio(X) ,4) ) +transpose((X+X) ,7) ) ,4,6) +transpose(((transpose((shuffle(X) +transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,-5) ) ,-7) +transpose(transpose(shuffle(echo(X,4,6) ) ,-5) ,4) ) +transpose(shuffle(transpose(((X+transpose(X,7) ) |X) ,-5) ) ,7) ) ,7) ) ,4,6) ,7) ) ,7) ) |echo((arpeggio(step(echo(transpose(transpose((step(X,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-7) ,-7) ,4,6) ,12) ) |((((shuffle(transpose(X,-7) ) +transpose((step((X+(X+transpose(X,7) ) ) ,12) +transpose(((X+X) |(X+transpose(X,12) ) ) ,-7) ) ,12) ) +transpose(step(step((echo(X,4,6) +echo((X+transpose(X,12) ) ,4,6) ) ,12) ,12) ,4) ) +transpose(transpose(((((X+transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,4) ) +transpose(X,7) ) ,4) ,7) ) +transpose(step(X,12) ,-5) ) ) ,4,6) ) ) ,12) random seed used was 0
|
The algorithm for Expresso is written in
KeyKit, and
here's the source code.
| | | |