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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Phrase for X:
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After 20 generations the expression "X" became this:
(((shuffle(echo((((transpose((transpose(transpose(echo(shuffle(X) ,4,6) ,-5) ,-5) +(((shuffle(echo((echo(X,4,6) +transpose((X+transpose((X+X) ,7) ) ,7) ) ,4,6) ) +transpose((echo((echo(shuffle(transpose(X,-7) ) ,4,6) |(transpose(X,4) +(X|(X+transpose(X,12) ) ) ) ) ,4,6) |(step(transpose(transpose((X|X) ,4) ,4) ,12) |(transpose(X,-5) +transpose(((X+transpose(X,12) ) |(X+X) ) ,12) ) ) ) ,4) ) +transpose((transpose(transpose((X|X) ,4) ,-5) +transpose((transpose(transpose(shuffle(X) ,-7) ,-5) |shuffle(transpose(X,-7) ) ) ,12) ) ,7) ) +transpose(X,-7) ) ) ,4) +transpose(((((transpose(transpose((arpeggio(X) |(step(X,12) |transpose(X,4) ) ) ,-7) ,4) +transpose(transpose(transpose(transpose((transpose(X,4) +transpose(((X+X) +transpose(((transpose(X,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose((X|X) ,-7) ) ,7) ) ,12) ) ,4) ,-5) ,-5) ,12) ) +transpose((((transpose(X,-7) +transpose(((step(X,12) +transpose(transpose(X,-7) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) +transpose(transpose((arpeggio(X) +transpose(transpose(echo(X,4,6) ,-7) ,12) ) ,-5) ,7) ) +transpose(((((X+transpose(X,12) ) +transpose(transpose(X,-5) ,12) ) +step((step((transpose(X,-7) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) +transpose(((echo(X,4,6) +transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) +((transpose(X,-7) +transpose(X,4) ) |X) ) ,12) ) ,12) ) +transpose(((shuffle((transpose(X,-7) |((transpose(X,-7) +transpose((X+X) ,4) ) +transpose((X+(X+X) ) ,7) ) ) ) +transpose((transpose((((X|(X|X) ) +transpose(transpose((X+transpose(X,12) ) ,-7) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) ,-5) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,4) ) +transpose(((transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,12) ) +X) ,4) +transpose((step(X,12) +transpose(X,12) ) ,4) ) |shuffle(transpose(transpose(step((X+X) ,12) ,-7) ,-7) ) ) ,7) ) ,7) ) ,12) ) ,4) ) +transpose((((transpose(((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +(X+transpose(X,4) ) ) ,-5) +transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose((transpose(shuffle(X) ,-5) |arpeggio(arpeggio(X) ) ) ,7) ) ,12) ) |(((transpose(X,4) +transpose(echo(arpeggio(X) ,4,6) ,7) ) +transpose(transpose((((transpose(X,4) +X) +transpose(X,4) ) +transpose(transpose(transpose(X,4) ,-5) ,7) ) ,-5) ,4) ) +transpose(transpose(transpose((X+transpose(X,12) ) ,-7) ,-5) ,7) ) ) +transpose(echo(transpose((echo(X,4,6) +transpose(transpose(transpose((X|X) ,-5) ,-7) ,12) ) ,-7) ,4,6) ,12) ) ,7) ) |(transpose(((arpeggio(step(((X+X) +X) ,12) ) +transpose((((transpose(X,-7) +transpose(X,4) ) +transpose(X,7) ) |arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,12) ) |shuffle(transpose(shuffle((transpose(X,-5) |(X+X) ) ) ,4) ) ) ,-5) +transpose(echo(transpose(transpose(echo(X,4,6) ,4) ,4) ,4,6) ,-7) ) ) ,4) ) +transpose(arpeggio(step(echo(shuffle(transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ) ,4,6) ,12) ) ,7) ) +transpose(transpose(transpose(transpose(transpose((transpose((transpose((transpose(X,-5) +transpose(echo(X,4,6) ,12) ) ,-7) +transpose((transpose((X+transpose(X,7) ) ,4) |(step(X,12) +(X|X) ) ) ,12) ) ,-7) +transpose((arpeggio((transpose(X,-7) +transpose(((X+transpose(X,12) ) |transpose(echo(X,4,6) ,4) ) ,7) ) ) +transpose((arpeggio((transpose((X+transpose(X,12) ) ,-5) +transpose(X,12) ) ) |(X+echo(X,4,6) ) ) ,7) ) ,12) ) ,-5) ,-7) ,4) ,-5) ,7) ) ,4,6) ) +transpose(echo((arpeggio((transpose(((transpose(step(step(transpose(X,-5) ,12) ,12) ,-7) |transpose(X,-7) ) +transpose(shuffle(transpose((transpose((transpose(X,-5) +transpose(transpose(X,-7) ,7) ) ,-7) +X) ,-5) ) ,7) ) ,-5) +transpose(transpose((transpose(transpose(transpose(step(X,12) ,-5) ,-7) ,4) |transpose(shuffle((X+X) ) ,-5) ) ,-7) ,-7) ) ) |((((transpose(transpose(shuffle(transpose(X,4) ) ,4) ,-5) |step(transpose(shuffle((step(shuffle(X) ,12) +(X|shuffle(transpose(X,-5) ) ) ) ) ,-5) ,12) ) |((shuffle((X|X) ) +transpose(shuffle((((X|X) |X) +transpose(X,12) ) ) ,7) ) |arpeggio(echo(transpose(transpose(X,4) ,-5) ,4,6) ) ) ) +transpose(transpose((transpose((((step(arpeggio(X) ,12) +transpose(transpose(((X|X) |X) ,4) ,7) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose((((echo(X,4,6) +transpose((X|X) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose((X+X) ,-5) ,7) ) ,4) ,7) ) ,-7) +transpose(transpose(((step(arpeggio(transpose(X,-5) ) ,12) +transpose((transpose(X,4) +((X|X) +transpose(X,-5) ) ) ,7) ) +transpose((transpose((arpeggio(X) +transpose((X+transpose(X,7) ) ,12) ) ,-5) |transpose(echo((X|X) ,4,6) ,4) ) ,12) ) ,-5) ,12) ) ,-7) ,12) ) |((transpose(((((arpeggio((transpose(X,4) +transpose(X,12) ) ) +transpose((((X+transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) +transpose(X,-5) ) ,7) ) +transpose(transpose((((arpeggio(X) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(transpose(X,4) ,4) ) +transpose(step(X,12) ,7) ) ,4) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ,4) ) ,-7) |(((shuffle(echo(step(X,12) ,4,6) ) +transpose((echo(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,4) ) +transpose((X|X) ,7) ) +transpose(transpose((X|X) ,-5) ,7) ) +transpose(((X+transpose((X+X) ,7) ) +step(X,12) ) ,7) ) ,4,6) +transpose((transpose(shuffle((X+transpose((X+transpose(X,12) ) ,7) ) ) ,-5) |transpose((X+transpose((X|X) ,12) ) ,-5) ) ,12) ) ,4) ) +transpose(transpose(transpose((((echo((X+transpose(X,7) ) ,4,6) +transpose(arpeggio(X) ,4) ) +transpose((echo(X,4,6) +(X|X) ) ,7) ) |echo(transpose(X,-5) ,4,6) ) ,-5) ,-7) ,7) ) |(transpose(arpeggio((transpose((X+transpose(X,7) ) ,4) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,4) +transpose(((((echo(X,4,6) +transpose(step(X,12) ,4) ) +transpose((X+X) ,7) ) +shuffle(X) ) |(transpose(X,-7) +X) ) ,-5) ) ) ) |transpose(((transpose(echo(((arpeggio(X) +transpose(transpose((X|X) ,-7) ,12) ) +transpose(transpose(transpose((X+((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ,-7) ,12) ) ,4,6) ,-5) +transpose(shuffle(transpose(X,-7) ) ,-7) ) +transpose(transpose(echo(echo(((X+transpose(X,12) ) +transpose((X+X) ,-5) ) ,4,6) ,4,6) ,4) ,12) ) ,-5) ) ) ) ,4,6) ,4) ) +transpose(transpose((transpose(((transpose((transpose(transpose(step((X+step(transpose(X,-5) ,12) ) ,12) ,-5) ,-7) +transpose(((transpose((((((transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-7) +transpose(((X+transpose(X,12) ) +shuffle(echo(X,4,6) ) ) ,4) ) +transpose((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) +step((X+transpose(X,7) ) ,12) ) ,7) ) |transpose(X,-7) ) +transpose(step(((X+transpose(X,7) ) +X) ,12) ,4) ) +transpose((echo(((((X+transpose(X,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(shuffle(X) ,7) ) |transpose(X,4) ) ,4,6) +arpeggio(step(transpose(transpose(X,-7) ,-5) ,12) ) ) ,7) ) ,4) +transpose((arpeggio(transpose(shuffle((X+transpose(X,12) ) ) ,-5) ) +transpose((step((((echo(X,4,6) +transpose(X,4) ) +transpose(((transpose(transpose(X,-5) ,-7) +transpose((X+transpose(X,12) ) ,4) ) +transpose(step((X+X) ,12) ,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) ,12) +transpose((transpose(((X+X) +transpose(shuffle((X+X) ) ,12) ) ,4) +transpose(arpeggio(transpose((X+X) ,-7) ) ,12) ) ,4) ) ,12) ) ,4) ) +transpose(shuffle((((arpeggio(arpeggio(X) ) +transpose(X,4) ) +transpose(((transpose(X,-7) +transpose((X+X) ,4) ) +transpose(shuffle(X) ,7) ) ,-7) ) +transpose(transpose(transpose((X+X) ,-7) ,-5) ,12) ) ) ,7) ) ,12) ) ,-5) |(arpeggio((shuffle(X) +transpose((arpeggio(X) +transpose(shuffle(X) ,4) ) ,12) ) ) +transpose((echo(X,4,6) |X) ,-7) ) ) |step(transpose((step((arpeggio(transpose(X,4) ) |(echo((X+transpose(step(X,12) ,12) ) ,4,6) +(transpose((X+transpose(transpose(X,4) ,7) ) ,-5) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |X) |(X|X) ) ,12) ) ) ) ,12) +step(transpose(step(((X+transpose(X,7) ) +transpose(X,12) ) ,12) ,-5) ,12) ) ,-5) ,12) ) ,4) +(transpose(((transpose((transpose(X,-7) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ,-7) |(((X|X) +transpose(transpose(X,4) ,7) ) +(((X|arpeggio(X) ) +transpose((X|X) ,4) ) +transpose(X,7) ) ) ) +echo((transpose((step(X,12) +transpose(X,7) ) ,-7) +transpose(transpose(((((step(X,12) +transpose(X,7) ) +transpose((X+(X|X) ) ,4) ) +transpose(transpose(X,-5) ,7) ) +(X+transpose(transpose(X,4) ,12) ) ) ,-5) ,7) ) ,4,6) ) ,-5) +echo(echo(step((transpose(step(X,12) ,4) |shuffle(transpose((shuffle(X) +(X+arpeggio(X) ) ) ,-7) ) ) ,12) ,4,6) ,4,6) ) ) ,4) ,4) ) +transpose(((transpose(arpeggio(((transpose(((transpose(transpose(((X+X) |step((echo(X,4,6) +X) ,12) ) ,4) ,4) +transpose(transpose(transpose((X+X) ,-7) ,-5) ,7) ) +transpose(arpeggio(((transpose((transpose(X,-7) +transpose((X|transpose(X,-7) ) ,12) ) ,-5) +transpose((transpose(transpose(transpose(X,4) ,4) ,-5) +transpose((transpose(X,-5) +transpose(X,-7) ) ,12) ) ,4) ) +transpose((transpose(transpose(X,-5) ,4) |((step(X,12) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ,7) ) ) ,7) ) ,-5) +transpose((transpose((((echo(step((X+transpose(X,-7) ) ,12) ,4,6) +echo(((X|X) +(X+X) ) ,4,6) ) +transpose(((X+X) +transpose(arpeggio(transpose((X+transpose(transpose(X,-5) ,12) ) ,-7) ) ,12) ) ,4) ) +transpose(echo(arpeggio(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,4) ) ,4,6) ,7) ) ,4) |step((shuffle(transpose(X,-7) ) +transpose(((transpose(step((step(X,12) |X) ,12) ,-7) +transpose(transpose((X+transpose(X,12) ) ,-7) ,7) ) +transpose(echo((arpeggio(shuffle(echo(shuffle(X) ,4,6) ) ) +(((transpose(X,-5) +(X+X) ) +(X+transpose((X|X) ,7) ) ) +echo(((X+X) |(X|X) ) ,4,6) ) ) ,4,6) ,12) ) ,12) ) ,12) ) ,4) ) +transpose(((transpose((shuffle((((transpose(echo(transpose(X,4) ,4,6) ,-7) +transpose(((X|X) |(X+transpose(X,12) ) ) ,4) ) +transpose(((X+X) +transpose(transpose(X,4) ,12) ) ,7) ) +transpose(((X+transpose(X,4) ) +transpose((X+transpose((X+X) ,7) ) ,7) ) ,-7) ) ) +transpose((shuffle(((X+transpose(X,7) ) +X) ) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,7) ) ,-5) +transpose(transpose(echo(arpeggio(echo(transpose(echo((step(transpose(X,-5) ,12) +transpose((step(X,12) +transpose((X|X) ,12) ) ,7) ) ,4,6) ,-5) ,4,6) ) ,4,6) ,-7) ,4) ) +transpose((step(transpose(transpose((step(echo((X+X) ,4,6) ,12) |(transpose(transpose((X|X) ,-5) ,-5) +echo(transpose(X,-5) ,4,6) ) ) ,-5) ,-5) ,12) |(transpose((transpose(((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(((X+transpose(X,12) ) +transpose((X|X) ,7) ) ,4) ) +transpose(step((transpose(X,4) +transpose(X,-7) ) ,12) ,7) ) ,4) +transpose(transpose((transpose(X,4) +transpose(((X+X) +transpose((X|X) ,12) ) ,7) ) ,-7) ,7) ) ,-7) |transpose(transpose(transpose(transpose(step(((((X|X) +(X+X) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) ,12) ,-7) ,4) ,-7) ,4) ) ) ,7) ) ,7) ) ) ,-5) +transpose(transpose(step(transpose(step(transpose(transpose(transpose(echo(transpose(arpeggio(X) ,-5) ,4,6) ,4) ,-5) ,-7) ,12) ,-5) ,12) ,4) ,12) ) +transpose((((shuffle(((shuffle(((shuffle(shuffle(X) ) |(((X+transpose(X,7) ) +transpose(X,7) ) +transpose(X,4) ) ) |(((transpose((X+transpose(transpose(X,-5) ,7) ) ,-7) +transpose((transpose(step(X,12) ,-5) |(X|step(X,12) ) ) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(shuffle(((arpeggio(X) +transpose(X,12) ) |shuffle(X) ) ) ,12) ) ) ) |((transpose(arpeggio((X|X) ) ,-7) |(X+X) ) |shuffle(arpeggio(transpose((X+transpose(X,12) ) ,4) ) ) ) ) |shuffle(echo(((((echo(X,4,6) +transpose(X,4) ) +transpose(((X+transpose(X,12) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) |transpose(X,4) ) |transpose(arpeggio((X+X) ) ,4) ) ,4,6) ) ) ) |transpose(((step((transpose(arpeggio(((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ,-5) |(transpose(transpose(transpose(X,-5) ,-7) ,4) +transpose((((X+transpose(X,7) ) |X) +step(X,12) ) ,12) ) ) ,12) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((((X+X) +transpose(shuffle(X) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,12) ) +transpose(X,-5) ) ,-5) ) +transpose(transpose((transpose(X,4) +transpose(transpose(X,4) ,-7) ) ,-5) ,7) ) ,-7) ) +transpose((step(transpose(arpeggio((arpeggio(X) |X) ) ,4) ,12) |(shuffle(shuffle(transpose(step(arpeggio(X) ,12) ,-7) ) ) +arpeggio(((echo(transpose(X,-5) ,4,6) +transpose(transpose((X|X) ,4) ,-5) ) +(((shuffle(X) +transpose(X,12) ) +transpose(((((echo((X+X) ,4,6) |arpeggio(echo(X,4,6) ) ) +transpose(transpose(X,-7) ,4) ) +transpose((arpeggio(transpose(X,4) ) +transpose(arpeggio(X) ,-7) ) ,7) ) +transpose((X|X) ,-5) ) ,4) ) +transpose((((echo(X,4,6) +transpose((X|X) ,12) ) |transpose(echo(X,4,6) ,-5) ) |((((X+X) +transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) ) ,7) ) ) ) ) ) ,7) ) |((((transpose(transpose((transpose(echo(echo(X,4,6) ,4,6) ,4) +(((step((X|X) ,12) +(X+transpose(X,12) ) ) +transpose((transpose(X,4) +transpose(echo(X,4,6) ,12) ) ,4) ) +transpose((transpose(X,4) +transpose(transpose(X,4) ,7) ) ,7) ) ) ,-7) ,4) +transpose(step(transpose(((((X+transpose(transpose(X,-5) ,12) ) +transpose(transpose((X+step(X,12) ) ,4) ,12) ) +echo((X|X) ,4,6) ) +(((X+transpose(X,12) ) +(X+X) ) +transpose((((X+X) +transpose(X,4) ) +transpose(step(X,12) ,7) ) ,12) ) ) ,-5) ,12) ,4) ) +transpose((((((arpeggio(transpose(transpose(echo(transpose((X+transpose(X,12) ) ,-7) ,4,6) ,4) ,-7) ) +transpose(transpose(transpose(echo(arpeggio((X+transpose(X,7) ) ) ,4,6) ,-5) ,-7) ,4) ) +transpose(((((((shuffle(transpose(((X+transpose(X,12) ) |transpose(X,4) ) ,-5) ) |transpose((X|X) ,-5) ) +transpose(shuffle(X) ,4) ) +transpose(((transpose(X,-5) +transpose(((X+X) +transpose(X,-5) ) ,12) ) |transpose(X,-5) ) ,7) ) +transpose(echo(step(shuffle((arpeggio(X) +transpose(transpose(X,4) ,-5) ) ) ,12) ,4,6) ,4) ) +transpose(transpose((((X|shuffle(X) ) |transpose((X+X) ,-5) ) +transpose(((transpose(transpose(step(X,12) ,4) ,-7) +transpose((transpose((X+transpose(X,7) ) ,4) |X) ,4) ) +transpose((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,-5) +transpose(shuffle(X) ,7) ) ,7) ) ,7) ) ,4) ,7) ) +transpose(arpeggio((transpose(transpose((((X+transpose(X,7) ) +transpose(arpeggio(X) ,-7) ) +(X+transpose(X,7) ) ) ,-7) ,-5) +transpose(step(transpose(((X+transpose(X,7) ) +transpose((X+transpose(transpose(X,4) ,12) ) ,12) ) ,-5) ,12) ,12) ) ) ,7) ) ,7) ) +transpose(((arpeggio((shuffle(transpose(transpose(((((X|X) +transpose(X,4) ) +transpose(X,7) ) |arpeggio(X) ) ,-7) ,-5) ) +transpose(transpose(arpeggio(transpose(((transpose(X,-7) |X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) ) ,4) ,12) ) ) +transpose(((echo(arpeggio(echo((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) ,4,6) ) ,4,6) +transpose((((arpeggio(X) +transpose(transpose((transpose(X,4) |X) ,4) ,7) ) |(transpose((echo(X,4,6) +transpose((X|X) ,7) ) ,-5) +transpose(echo((echo(X,4,6) +transpose(X,12) ) ,4,6) ,12) ) ) |transpose(transpose((X+transpose(X,7) ) ,-5) ,4) ) ,12) ) +transpose(((transpose(transpose(transpose((step(X,12) +X) ,-7) ,-5) ,4) +transpose(transpose((transpose(((shuffle((transpose(X,-7) |transpose(X,-5) ) ) +transpose(((X+X) |transpose(X,4) ) ,4) ) +transpose((arpeggio(X) +transpose(transpose(X,-5) ,7) ) ,7) ) ,-7) +transpose(transpose(echo(X,4,6) ,-7) ,12) ) ,4) ,4) ) +transpose(transpose(step(transpose(transpose(step((X+transpose(X,12) ) ,12) ,-5) ,4) ,12) ,-5) ,7) ) ,4) ) ,7) ) |transpose(echo(((((((echo(X,4,6) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) +(echo(X,4,6) +X) ) +transpose(echo(((X|X) +transpose((X+X) ,7) ) ,4,6) ,4) ) +transpose(((X+(X+X) ) +transpose(echo(arpeggio(X) ,4,6) ,7) ) ,7) ) +shuffle((echo((((X+transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +shuffle(X) ) ,4,6) +(transpose(X,-7) |shuffle(X) ) ) ) ) ,4,6) ,-5) ) ,4) ) +transpose(((transpose(transpose(transpose(transpose(arpeggio(X) ,-5) ,-7) ,4) ,-5) +transpose(step((echo(shuffle((step((X+transpose(X,12) ) ,12) +transpose(transpose(X,4) ,7) ) ) ,4,6) +transpose(transpose(transpose((transpose(transpose(X,4) ,4) +(transpose(X,-7) +transpose(transpose(X,-5) ,-5) ) ) ,4) ,-5) ,12) ) ,12) ,4) ) +transpose(((((shuffle((X+(X+X) ) ) |((X+transpose((X|X) ,12) ) +transpose(X,4) ) ) +transpose(shuffle(transpose(transpose(X,-7) ,-5) ) ,7) ) +transpose((echo(shuffle(step(X,12) ) ,4,6) +transpose(transpose(X,-5) ,-5) ) ,7) ) |arpeggio((transpose(arpeggio(arpeggio(((X+transpose(X,12) ) +transpose(transpose(X,4) ,7) ) ) ) ,4) +transpose(((((echo(step(X,12) ,4,6) +transpose(echo(X,4,6) ,12) ) +transpose((((X+transpose(step(X,12) ,7) ) +shuffle(X) ) +transpose((X|X) ,12) ) ,4) ) +transpose(step((step(X,12) |(X+transpose(X,7) ) ) ,12) ,7) ) |((transpose(transpose(X,-7) ,-5) +transpose(step(transpose(X,-5) ,12) ,4) ) +transpose((transpose(X,-5) +(X+X) ) ,7) ) ) ,-5) ) ) ) ,7) ) ,7) ) |echo(transpose((arpeggio((arpeggio(arpeggio((arpeggio(X) +X) ) ) +transpose(arpeggio(transpose(shuffle(echo(X,4,6) ) ,4) ) ,12) ) ) |((shuffle((step((echo(X,4,6) +transpose(transpose(X,-7) ,12) ) ,12) |transpose((X+X) ,4) ) ) +transpose(shuffle(echo(transpose((shuffle(X) +shuffle(X) ) ,4) ,4,6) ) ,12) ) |(((shuffle(echo(transpose(X,-7) ,4,6) ) +echo(arpeggio(arpeggio(transpose(X,4) ) ) ,4,6) ) +transpose(echo(((((shuffle(transpose(transpose(X,-7) ,-7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) +transpose(transpose(transpose(X,-5) ,-5) ,4) ) +transpose((arpeggio((transpose(transpose(X,-5) ,4) +X) ) +transpose((arpeggio(X) +transpose(transpose(X,-5) ,4) ) ,12) ) ,7) ) ,4,6) ,4) ) +transpose(transpose((transpose((transpose(X,-5) +transpose((X+X) ,7) ) ,4) |X) ,-5) ,7) ) ) ) ,-5) ,4,6) ) ,7) ) +transpose(arpeggio(transpose(((((transpose(transpose(transpose(((X+transpose(X,12) ) +X) ,-7) ,-5) ,-7) +(arpeggio(X) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +(transpose(transpose(X,-7) ,-5) +transpose(transpose(echo(echo(X,4,6) ,4,6) ,-7) ,7) ) ) ,7) ) ) +(arpeggio(arpeggio((shuffle(X) |transpose((X+transpose(X,12) ) ,-7) ) ) ) |transpose(((X|X) |(transpose(X,4) +transpose((X+transpose(X,12) ) ,12) ) ) ,-7) ) ) +transpose(((((((((X|X) +transpose(X,4) ) +transpose((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ) +transpose(transpose(step(X,12) ,-7) ,7) ) +transpose((X|X) ,-7) ) +transpose(transpose(transpose(step(transpose((X+transpose(X,12) ) ,-5) ,12) ,-7) ,-5) ,4) ) +transpose((((transpose(transpose(X,4) ,4) +transpose(echo(X,4,6) ,4) ) +transpose(((X+transpose(X,12) ) +transpose((X|X) ,7) ) ,7) ) +transpose((arpeggio(arpeggio(X) ) |((X+transpose(echo(transpose(X,-7) ,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ,12) ) ,7) ) |(transpose(echo((X+transpose(transpose(X,-7) ,12) ) ,4,6) ,4) +transpose(transpose(arpeggio((((X+arpeggio(X) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(step(X,12) ,7) ) ) ,-7) ,7) ) ) ,4) ) +transpose(step(transpose((transpose((transpose((shuffle(X) +transpose(X,-5) ) ,-5) +transpose(echo(((step(X,12) +transpose(X,4) ) +transpose((X+X) ,7) ) ,4,6) ,12) ) ,4) +(transpose(echo(X,4,6) ,-5) +transpose((X+transpose(transpose(X,-7) ,12) ) ,-5) ) ) ,4) ,12) ,7) ) ,-7) ) ,4) ) +transpose(shuffle((transpose(arpeggio((((transpose(transpose(arpeggio(shuffle(transpose(X,-5) ) ) ,4) ,4) +(transpose(X,-5) |(transpose((X+X) ,-5) +transpose(((((X+transpose(X,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(shuffle(transpose(X,-7) ) ,4) ) +transpose(arpeggio(transpose(X,4) ) ,7) ) ,12) ) ) ) +transpose(echo(echo(echo(shuffle(transpose(X,-7) ) ,4,6) ,4,6) ,4,6) ,12) ) +transpose((((((X+transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) +transpose(((X+X) +transpose(transpose(X,-7) ,7) ) ,4) ) +transpose((X|X) ,7) ) ,-5) ) ) ,-5) +transpose(transpose(transpose(transpose(shuffle(shuffle((X+transpose(X,12) ) ) ) ,-7) ,-5) ,4) ,12) ) ) ,7) ) ) ,4) ) ,7) )
random seed used was 240801969

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