Home : Tune Toys : Expresso 
  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.

Transformations:
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After 20 generations the expression "X" became this:
transpose(((((transpose(echo(echo(transpose((echo(step(transpose(X,-5) ,12) ,4,6) +transpose((X+X) ,7) ) ,-5) ,4,6) ,4,6) ,4) +transpose(transpose(step(shuffle(arpeggio(((arpeggio((step(transpose(echo(X,4,6) ,-5) ,12) +transpose((shuffle(X) |X) ,12) ) ) +transpose(transpose(transpose(transpose(shuffle(X) ,-7) ,-7) ,4) ,4) ) +transpose((transpose(((X+transpose(transpose(X,4) ,12) ) +arpeggio((X+transpose(X,7) ) ) ) ,4) +transpose(arpeggio(X) ,12) ) ,7) ) ) ) ,12) ,-7) ,12) ) +transpose(((((echo(step(((((X+transpose(X,4) ) +transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(echo(X,4,6) ,7) ) ,12) ,4,6) +step((echo(((arpeggio(X) |transpose(echo(X,4,6) ,-5) ) +transpose(((transpose(transpose(X,-7) ,-5) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,12) ) ,4,6) +transpose(transpose(step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,12) ,-5) ,7) ) ,12) ) +transpose((((shuffle(shuffle(((transpose(transpose(shuffle((X+X) ) ,-7) ,-7) |transpose((echo((X+transpose(X,7) ) ,4,6) |echo(transpose(X,4) ,4,6) ) ,-5) ) +transpose(echo(transpose(((transpose(X,4) +transpose(transpose(X,4) ,12) ) +transpose(transpose(X,4) ,7) ) ,-7) ,4,6) ,12) ) ) ) +transpose(((((shuffle(X) +transpose(((transpose(echo((X|X) ,4,6) ,4) +transpose((X|X) ,4) ) +transpose(shuffle((X+transpose((X+transpose(X,12) ) ,7) ) ) ,7) ) ,7) ) |((X+transpose(X,12) ) |transpose(transpose((X|transpose(X,-5) ) ,-7) ,-7) ) ) +transpose(arpeggio(X) ,4) ) +transpose(((transpose(X,4) |arpeggio(X) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) ,7) ) ,-7) ) +transpose(transpose(transpose(step(shuffle(transpose(X,4) ) ,12) ,4) ,-7) ,4) ) +transpose(transpose(arpeggio(transpose((echo(transpose(X,4) ,4,6) +transpose(((transpose(transpose(step(X,12) ,-7) ,-5) +transpose((((transpose(X,-7) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,4) ,7) ) |shuffle(X) ) ,4) ) +transpose(step((shuffle(X) |(transpose(X,-5) +transpose(X,7) ) ) ,12) ,7) ) ,7) ) ,4) ) ,-5) ,7) ) ,4) ) +transpose(step(((((arpeggio((X+transpose(X,7) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,4) ,4) ) +transpose(shuffle(echo(X,4,6) ) ,7) ) |(arpeggio(transpose(((transpose(X,-7) +(transpose(transpose(X,4) ,4) +step(X,12) ) ) +arpeggio((((echo(X,4,6) +transpose((((X+transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(step(X,12) ,7) ) +transpose((transpose(X,-7) |transpose(transpose(X,4) ,-5) ) ,7) ) ) ) ,-7) ) +transpose(transpose((transpose(transpose(X,-7) ,4) +transpose(shuffle(transpose(transpose(X,-7) ,-7) ) ,7) ) ,-5) ,12) ) ) ,12) ,7) ) +transpose(arpeggio(arpeggio(step(transpose(transpose((transpose(X,4) +transpose(step(step(X,12) ,12) ,12) ) ,-7) ,-5) ,12) ) ) ,7) ) ,12) ) +transpose(echo(arpeggio(transpose(transpose(transpose((transpose(transpose((transpose(shuffle(X) ,-5) +transpose(transpose(X,-7) ,12) ) ,-7) ,-7) +transpose(step(((transpose((((((X+transpose(X,12) ) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose((step(X,12) |(X+X) ) ,4) ) +transpose((((X|X) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) ,7) ) ,-7) +transpose(arpeggio(transpose((step(X,12) |step(X,12) ) ,-5) ) ,4) ) +transpose(transpose(transpose(transpose(transpose(step(step(X,12) ,12) ,-7) ,-7) ,4) ,-5) ,7) ) ,12) ,12) ) ,-5) ,-7) ,-5) ) ,4,6) ,4) ) +transpose(transpose(arpeggio(transpose(arpeggio(transpose(((echo(step(step(transpose(step(X,12) ,-7) ,12) ,12) ,4,6) +transpose(transpose(echo(((step(transpose(X,-5) ,12) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(shuffle(shuffle(X) ) ,12) ) ,4,6) ,4) ,4) ) +transpose(arpeggio((arpeggio(transpose((X+X) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(arpeggio(X) ,12) ) ,7) ) ) ,7) ) ,-7) ) ,-7) ) ,-5) ,7) ) ,4)
random seed used was 143012226 EXPR = arpeggio((((echo((transpose(transpose((shuffle(arpeggio(transpose(transpose(transpose(X,4) ,4) ,4) ) ) +transpose(transpose((shuffle(transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ,-5) ,12) ) ,-5) ,-5) |transpose(transpose(((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(transpose(X,-7) ,12) ) |shuffle(arpeggio(X) ) ) ,-7) ,4) ) ,4,6) +transpose(shuffle(transpose((echo(arpeggio(transpose(transpose(X,-7) ,-7) ) ,4,6) +transpose((transpose(transpose(transpose(X,-7) ,-7) ,-7) +transpose((echo(transpose(arpeggio(X) ,-5) ,4,6) +transpose(((transpose(X,-5) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,12) ) ,7) ) ,4) ) ,-7) ) +transpose(transpose(echo(((transpose(transpose(((transpose(transpose(transpose(transpose(X,-5) ,4) ,-5) ,-5) +transpose((((echo(echo(X,4,6) ,4,6) +transpose((X|X) ,12) ) +transpose(((arpeggio(transpose(X,-5) ) +transpose((X|X) ,4) ) +transpose(shuffle(arpeggio(X) ) ,7) ) ,4) ) +transpose(transpose(arpeggio(X) ,4) ,7) ) ,4) ) +transpose((arpeggio(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) +transpose(step(shuffle(X) ,12) ,12) ) ,7) ) ,4) ,4) +transpose(transpose((transpose(step((transpose(((X+transpose(transpose(X,-7) ,7) ) +transpose(arpeggio(transpose(X,4) ) ,7) ) ,-5) +((X+transpose(X,7) ) |echo((X|X) ,4,6) ) ) ,12) ,-7) +arpeggio(transpose(transpose(transpose(step(X,12) ,-7) ,-5) ,-7) ) ) ,-7) ,4) ) +transpose((transpose((transpose(((transpose(transpose(X,4) ,4) +transpose(transpose(X,4) ,4) ) +transpose(((X+transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) ,7) ) ,-5) |echo(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(((X+transpose((X|X) ,4) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ,4,6) ) ,-5) |transpose(arpeggio((step(X,12) +transpose(X,-7) ) ) ,-5) ) ,7) ) ,4,6) ,4) ,4) ) +transpose(transpose(echo(((shuffle(transpose(transpose(transpose(arpeggio(transpose((transpose(X,4) +transpose(X,-5) ) ,-7) ) ,4) ,-7) ,-7) ) +transpose(((step(step((X|echo(X,4,6) ) ,12) ,12) +transpose(shuffle((step(X,12) +transpose(X,12) ) ) ,12) ) +transpose(((echo(transpose(step((X|X) ,12) ,-5) ,4,6) +transpose(transpose(arpeggio(((transpose(transpose(((X|transpose(X,-5) ) |echo(X,4,6) ) ,-7) ,-7) +transpose(echo((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose(shuffle(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,7) ) ,4,6) ,4) ) +transpose(((step(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) +transpose(transpose((transpose(X,-7) +transpose(transpose((X+X) ,-5) ,12) ) ,-7) ,4) ) +transpose(transpose((transpose(X,-5) |(X|X) ) ,-5) ,7) ) ,7) ) ) ,4) ,4) ) +transpose((transpose(transpose(((step(X,12) +transpose(transpose(X,-7) ,4) ) +transpose((((X|(X|X) ) +transpose(((X+transpose(X,12) ) |transpose(X,-7) ) ,4) ) +transpose(echo(transpose(X,4) ,4,6) ,7) ) ,7) ) ,-7) ,4) |shuffle(transpose((X|X) ,-5) ) ) ,7) ) ,7) ) ,4) ) +transpose(transpose(echo(arpeggio(X) ,4,6) ,-7) ,7) ) ,4,6) ,-5) ,7) ) )
random seed used was 0 EXPR = transpose((transpose(transpose((step((((shuffle(transpose((arpeggio(X) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(echo(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) |shuffle(X) ) ,-5) ,4,6) ,12) ) +transpose(step(transpose(step(shuffle(X) ,12) ,4) ,12) ,7) ) +((((((transpose(X,4) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) ,4) ) +transpose((shuffle(echo(X,4,6) ) |(X+transpose(transpose(X,-5) ,12) ) ) ,7) ) +transpose(shuffle((((X+transpose(X,4) ) +transpose(X,7) ) |echo(X,4,6) ) ) ,4) ) +transpose((transpose(((X+transpose(arpeggio(X) ,4) ) +transpose(X,7) ) ,4) |transpose(((echo((X|X) ,4,6) +transpose(shuffle((X+transpose(X,12) ) ) ,4) ) +transpose(arpeggio(X) ,7) ) ,-5) ) ,7) ) +transpose((transpose((X+echo(X,4,6) ) ,4) +transpose(transpose(X,4) ,7) ) ,4) ) +transpose(step((((step(X,12) |(X|X) ) +transpose(shuffle(((shuffle(X) +transpose((transpose(X,4) |(X|X) ) ,12) ) |(X+transpose(X,12) ) ) ) ,4) ) +transpose(transpose(step(X,12) ,-7) ,7) ) ,12) ,7) ) ) ,12) |transpose(arpeggio(transpose(echo((((transpose((step((X+transpose(X,12) ) ,12) +transpose(X,7) ) ,4) +transpose(transpose(transpose(((X|((X+transpose(X,4) ) +transpose(X,7) ) ) |X) ,4) ,-7) ,12) ) +transpose(transpose(transpose((transpose(X,4) +transpose(arpeggio(X) ,12) ) ,4) ,4) ,4) ) +transpose(((transpose(X,-5) +X) |transpose(arpeggio(transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,-5) ) ,4) ) ,7) ) ,4,6) ,4) ) ,-5) ) ,4) ,-7) |(transpose((arpeggio(((echo(transpose(echo(arpeggio(shuffle(transpose(transpose(X,4) ,-5) ) ) ,4,6) ,-7) ,4,6) |(step((step((transpose(X,-5) |(X|X) ) ,12) |X) ,12) |(arpeggio(transpose((((step(transpose(X,-5) ,12) +transpose(arpeggio(((X|X) |(X+transpose(X,12) ) ) ) ,4) ) +transpose(shuffle(X) ,7) ) |transpose((shuffle(X) +transpose(((transpose(X,-5) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,12) ) ,4) ) ,4) ) +transpose(echo(transpose(transpose(shuffle(X) ,4) ,-5) ,4,6) ,-5) ) ) ) +transpose(shuffle(arpeggio(transpose(transpose(transpose(X,-7) ,-5) ,-7) ) ) ,12) ) ) +transpose(transpose(step((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) |((arpeggio(X) +transpose((X|transpose(X,-7) ) ,4) ) +transpose(((X|X) |X) ,7) ) ) ,12) ,4) ,12) ) ,-5) +transpose(transpose(echo(((((transpose(X,-7) +(step((X+transpose(X,-7) ) ,12) |step(X,12) ) ) +transpose(transpose(transpose(((transpose(echo(X,4,6) ,-5) +transpose((X|X) ,7) ) +transpose(step(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(shuffle(X) ,-5) ,4) ) +transpose(echo(shuffle(X) ,4,6) ,7) ) ,12) ,7) ) ,-7) ,-7) ,12) ) +transpose(((((transpose(X,4) |((X+transpose(X,12) ) +transpose(X,12) ) ) |transpose((X|X) ,-5) ) +transpose((shuffle(((step(X,12) +(X+transpose(X,7) ) ) +transpose(X,12) ) ) |shuffle(transpose(transpose(((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ,4) ) ) ,4) ) +transpose(step(transpose((((X+transpose(X,7) ) +X) +transpose(((X|X) +X) ,7) ) ,-5) ,12) ,7) ) ,7) ) +transpose(transpose(echo(((((transpose(X,-7) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) +((((X+transpose(X,12) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(step(echo(X,4,6) ,12) ,12) ) ) +arpeggio(transpose(X,-7) ) ) ,4,6) ,4) ,12) ) ,4,6) ,4) ,12) ) ) ,4)
random seed used was 0 EXPR = arpeggio(shuffle(((transpose(transpose((arpeggio((transpose(echo(step(((((arpeggio(X) +transpose(step(X,12) ,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(arpeggio((transpose(X,4) +transpose(X,12) ) ) ,7) ) +transpose((((echo((((X+transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ,4,6) +transpose(arpeggio(transpose(X,-7) ) ,7) ) +transpose((arpeggio((transpose(X,-7) +transpose(echo(X,4,6) ,12) ) ) +transpose((transpose(transpose(X,-7) ,-5) |echo((X+transpose(X,12) ) ,4,6) ) ,12) ) ,4) ) +transpose(step(shuffle(X) ,12) ,7) ) ,7) ) ,12) ,4,6) ,4) +transpose(transpose(transpose(arpeggio(X) ,-7) ,-7) ,-5) ) ) +(transpose((((transpose(transpose(transpose(shuffle(X) ,-7) ,-5) ,-5) +transpose(shuffle(transpose(X,4) ) ,-5) ) +transpose(transpose(arpeggio(arpeggio(transpose(X,-7) ) ) ,-7) ,12) ) +transpose((transpose(transpose(transpose(X,-7) ,4) ,4) +(((arpeggio(transpose((X|X) ,4) ) |arpeggio(transpose(X,-7) ) ) +(transpose(X,4) +arpeggio(X) ) ) +transpose(transpose(((((step(X,12) |echo(X,4,6) ) |(transpose(X,4) +transpose(transpose(X,-5) ,12) ) ) +transpose(((transpose(X,-7) +transpose(echo(X,4,6) ,12) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,12) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) ,-7) ,7) ) ) ,7) ) ,-7) |echo((transpose(echo(((X|X) |(X|X) ) ,4,6) ,4) +transpose(transpose(arpeggio((step(X,12) |arpeggio(X) ) ) ,-7) ,12) ) ,4,6) ) ) ,-5) ,-5) +transpose((transpose(transpose(step(transpose(transpose(transpose(transpose((step(X,12) |echo(X,4,6) ) ,-5) ,-7) ,-7) ,4) ,12) ,-5) ,4) +transpose(transpose(arpeggio(shuffle(((shuffle((((transpose(echo((X+transpose(X,7) ) ,4,6) ,-7) +transpose(step(((X+transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose(transpose(transpose((X+transpose(X,12) ) ,-5) ,-7) ,7) ) ,12) ,7) ) +transpose(arpeggio(transpose((((((X+transpose(X,12) ) +transpose(step(X,12) ,4) ) +transpose(X,7) ) +transpose((X+transpose(transpose(X,-7) ,12) ) ,4) ) +transpose(transpose((X+transpose(echo(X,4,6) ,7) ) ,4) ,7) ) ,4) ) ,4) ) +transpose(transpose(transpose(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,4) ,4) ,7) ) ) |(transpose(arpeggio((transpose(((transpose(X,4) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(X,7) ) ,-5) +transpose((X+transpose(X,7) ) ,7) ) ) ,-5) |(step(arpeggio((transpose(X,-7) |(transpose(X,-7) +transpose(X,12) ) ) ) ,12) |(((transpose((X|X) ,-7) +transpose(shuffle(transpose(X,-5) ) ,7) ) +transpose(arpeggio(X) ,4) ) +transpose(transpose(((step(X,12) +(X|X) ) +X) ,4) ,12) ) ) ) ) +transpose(echo(((transpose(transpose(transpose((step(X,12) +transpose(step(transpose(X,4) ,12) ,7) ) ,-5) ,-7) ,-7) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,7) ) +transpose((shuffle((((X+transpose(X,7) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) ) |(X+transpose(transpose(transpose((X|X) ,-7) ,-5) ,7) ) ) ,12) ) ,4,6) ,12) ) ) ) ,-7) ,12) ) ,4) ) +transpose(transpose(transpose(((echo((step((echo(((X+transpose(X,12) ) +transpose(arpeggio(X) ,12) ) ,4,6) +transpose((((transpose((X|transpose(X,4) ) ,4) |shuffle(transpose(transpose((X+transpose(X,12) ) ,-5) ,4) ) ) |transpose(transpose(step(((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose((X|X) ,7) ) ,12) ,-7) ,-7) ) +transpose(step(echo(transpose(step(X,12) ,4) ,4,6) ,12) ,12) ) ,-7) ) ,12) +transpose((((((transpose(echo(transpose((X+transpose(X,12) ) ,4) ,4,6) ,-7) +transpose((step(transpose(arpeggio(X) ,4) ,12) |X) ,4) ) +transpose(((transpose((X+X) ,-7) +((transpose(transpose(X,-5) ,-7) +transpose(step(step(X,12) ,12) ,4) ) +transpose(((X+transpose(echo(X,4,6) ,4) ) +transpose((X|X) ,7) ) ,7) ) ) +transpose(((step(arpeggio(((X|X) |X) ) ,12) +transpose((echo((X|X) ,4,6) +(X+transpose((X+transpose(X,7) ) ,7) ) ) ,4) ) +transpose(shuffle((transpose(X,4) +transpose(X,7) ) ) ,7) ) ,7) ) ,7) ) |((transpose(((arpeggio(transpose(X,4) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(transpose(X,-5) ,-5) ,7) ) ,-5) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(shuffle(X) ,7) ) ,-7) ) +transpose(transpose((transpose(X,4) +transpose(arpeggio((X|X) ) ,12) ) ,-5) ,12) ) ) |(transpose((shuffle(((transpose(X,-7) |(X+transpose(X,7) ) ) |step(X,12) ) ) |(((arpeggio(X) +transpose(transpose(X,-5) ,7) ) +transpose(echo(transpose(X,4) ,4,6) ,4) ) +transpose((transpose(X,4) |(step(X,12) +transpose((X+transpose(X,7) ) ,12) ) ) ,7) ) ) ,4) +transpose(((transpose(step(X,12) ,4) +transpose(step(shuffle(((X+transpose(X,12) ) |shuffle(X) ) ) ,12) ,7) ) +transpose((transpose(transpose(X,-5) ,-7) +transpose((X+transpose((X|X) ,12) ) ,-7) ) ,12) ) ,7) ) ) |transpose(step(transpose((X|X) ,-5) ,12) ,4) ) ,12) ) ,4,6) +transpose(transpose(step((((((X|X) +transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose((X|((shuffle(X) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) ,7) ) +(((transpose(shuffle(X) ,4) |transpose(transpose(X,4) ,-5) ) +transpose(transpose((X+transpose(X,7) ) ,-7) ,4) ) +transpose(((X+X) +transpose(X,-5) ) ,7) ) ) ,12) ,-7) ,12) ) +((step((shuffle(echo(transpose((((transpose(X,-5) +transpose(transpose(transpose(transpose(X,4) ,-5) ,-7) ,4) ) +transpose(echo(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,4,6) ,7) ) +transpose((step(transpose((X+transpose(X,12) ) ,4) ,12) |((X+(X+transpose(X,12) ) ) +transpose(step((transpose(X,-7) +X) ,12) ,7) ) ) ,12) ) ,-7) ,4,6) ) |((transpose((transpose(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |X) +transpose(shuffle(transpose(X,-5) ) ,12) ) ,-7) ,4) |(((echo((X|transpose(X,4) ) ,4,6) +transpose(transpose(X,4) ,-7) ) +transpose(echo(step(step(X,12) ,12) ,4,6) ,7) ) |(transpose(transpose(transpose(transpose(X,4) ,4) ,4) ,4) +transpose((transpose(((X+X) |(X|X) ) ,4) +transpose(((X|X) |((X|X) |X) ) ,7) ) ,12) ) ) ) ,4) +transpose(((shuffle(transpose(transpose(X,-5) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(transpose(transpose((X|X) ,4) ,-5) ,7) ) ,4) ) +transpose(echo(((echo(transpose((X|(X|X) ) ,-7) ,4,6) |shuffle(transpose((X|X) ,-7) ) ) +transpose(((shuffle((transpose(X,4) |(X+transpose(X,7) ) ) ) +transpose(transpose(X,-5) ,12) ) +transpose(arpeggio((echo(shuffle(step(X,12) ) ,4,6) |(X+transpose(X,12) ) ) ) ,7) ) ,12) ) ,4,6) ,7) ) ) ,12) +transpose(transpose((((transpose(step(shuffle(X) ,12) ,-5) +transpose(((((transpose(step(X,12) ,4) +transpose((X+transpose(X,7) ) ,4) ) +transpose(arpeggio(echo(X,4,6) ) ,7) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,4) ) +transpose(shuffle(((X+transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,4) ,7) ) ) ,7) ) ,7) ) |((X+transpose(((X+transpose(X,12) ) +transpose(transpose(X,4) ,7) ) ,12) ) +transpose(shuffle(((transpose(X,-7) |transpose(X,4) ) |(X+transpose(X,7) ) ) ) ,12) ) ) +transpose((((step(transpose(transpose(X,4) ,-5) ,12) |arpeggio(transpose(transpose((X+transpose(X,12) ) ,-5) ,4) ) ) +transpose(step(arpeggio((echo(X,4,6) |echo(X,4,6) ) ) ,12) ,4) ) +transpose(transpose(echo((X|transpose(X,4) ) ,4,6) ,4) ,7) ) ,4) ) ,-7) ,7) ) +transpose(((step(echo(echo((transpose(transpose(X,-5) ,-5) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) ,4,6) ,4,6) ,12) +transpose(transpose((transpose(((((transpose(X,4) +X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(echo(transpose(X,4) ,4,6) ,7) ) ,-5) |transpose((((X+transpose((transpose(X,-5) +transpose(X,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,12) ) ,-7) ) ,-7) ,12) ) +transpose(transpose(transpose((transpose(shuffle(step(X,12) ) ,-7) +transpose(arpeggio(transpose(X,4) ) ,7) ) ,-5) ,4) ,12) ) ,7) ) ) ,4) ,-5) ,7) ) ) )
random seed used was 0

The algorithm for Expresso is written in KeyKit, and here's the source code.