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:
# of Tracks:
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After 20 generations the expression "X" became this:
((((echo((((transpose(((shuffle(transpose(X,-5) ) +transpose(transpose((step(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,12) +((X+X) +transpose(X,12) ) ) ,4) ,4) ) +transpose(arpeggio(((X|X) +transpose(transpose(X,-7) ,12) ) ) ,7) ) ,-5) +transpose(transpose(transpose((echo((step(transpose(X,-7) ,12) +(X+transpose(X,-5) ) ) ,4,6) +transpose((arpeggio(X) |transpose(X,-5) ) ,-7) ) ,4) ,-7) ,12) ) |transpose(arpeggio(transpose(transpose(transpose((X|X) ,-7) ,-7) ,-5) ) ,-5) ) +transpose(transpose(transpose(X,4) ,-7) ,4) ) ,4,6) +transpose(transpose(transpose((transpose(transpose((arpeggio(((transpose(((X|X) |((X|X) |(X+transpose(X,12) ) ) ) ,-7) +transpose(transpose(transpose((X+shuffle(X) ) ,-5) ,4) ,4) ) +transpose(transpose((transpose((X+X) ,4) +transpose(X,-7) ) ,-7) ,7) ) ) +transpose(transpose(((echo(transpose(shuffle(X) ,-7) ,4,6) |(echo(X,4,6) +transpose(echo(X,4,6) ,12) ) ) +(arpeggio((step(X,12) |(arpeggio(X) |transpose(X,-7) ) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ,-5) ,12) ) ,-5) ,-7) +step(((transpose(shuffle((transpose(X,4) |(X+transpose(X,12) ) ) ) ,-5) +transpose(((transpose(transpose(transpose(transpose((X|X) ,4) ,4) ,4) ,-5) +transpose(transpose(transpose(step(transpose(X,4) ,12) ,-5) ,4) ,12) ) |(transpose(shuffle(transpose(X,-5) ) ,-5) +transpose(transpose(step(transpose(transpose(transpose(X,4) ,4) ,-5) ,12) ,-5) ,7) ) ) ,7) ) +transpose((transpose(arpeggio((((arpeggio(transpose(X,4) ) |(X+X) ) +transpose(((transpose(X,4) +transpose((X+X) ,4) ) +transpose(transpose(X,4) ,7) ) ,4) ) +((echo(arpeggio(((X+X) +echo(X,4,6) ) ) ,4,6) +transpose(transpose(X,4) ,4) ) +transpose(step(echo(X,4,6) ,12) ,7) ) ) ) ,4) |transpose(((((X|X) |(shuffle(X) +transpose(X,12) ) ) +transpose(echo(X,4,6) ,-7) ) |arpeggio((echo(step(X,12) ,4,6) +transpose((transpose(X,4) +(X+X) ) ,7) ) ) ) ,-7) ) ,12) ) ,12) ) ,-7) ,-7) ,4) ) +transpose((step(transpose(echo(transpose(transpose(((shuffle((X|X) ) +(((X|X) +transpose(transpose(X,4) ,12) ) |(step(echo(X,4,6) ,12) +step(X,12) ) ) ) +transpose(transpose(((X+transpose(X,12) ) +((X|X) |(X+transpose(X,12) ) ) ) ,-7) ,7) ) ,4) ,4) ,4,6) ,4) ,12) +transpose(((echo(shuffle(X) ,4,6) +(step(transpose(X,4) ,12) +((transpose((X+transpose(transpose(X,-7) ,12) ) ,-7) |((transpose(transpose(X,-5) ,-5) +transpose((transpose(X,-5) +transpose(X,4) ) ,4) ) +transpose(((X|X) +transpose(X,-7) ) ,7) ) ) +arpeggio((transpose(transpose(transpose(X,4) ,-7) ,-7) |transpose(shuffle((X|X) ) ,-5) ) ) ) ) ) +step((transpose(step((X|X) ,12) ,-5) |transpose((X+(echo(X,4,6) |(X+X) ) ) ,-5) ) ,12) ) ,12) ) ,7) ) |transpose(((transpose(((((transpose((transpose(X,4) |((X+transpose(X,12) ) +transpose(X,7) ) ) ,-7) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(arpeggio(X) ,4) ) +transpose(transpose(echo((transpose(X,4) |(X+transpose(X,12) ) ) ,4,6) ,4) ,7) ) ,12) ) +transpose((transpose((echo(X,4,6) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) |X) ,-7) ) +transpose(transpose((((transpose((transpose(arpeggio(X) ,4) +step(shuffle(transpose(X,-5) ) ,12) ) ,-5) |echo((transpose(transpose(X,-5) ,-7) +transpose(X,-7) ) ,4,6) ) +transpose((((step(transpose((X|X) ,-5) ,12) +transpose((shuffle(X) +transpose(transpose((X|X) ,4) ,7) ) ,12) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,12) ) +(((X+transpose(transpose((X+X) ,4) ,4) ) +transpose((X+X) ,7) ) +step(X,12) ) ) ,4) ) +transpose((transpose(transpose((X|(X+transpose(X,7) ) ) ,4) ,4) +step(transpose(step(X,12) ,-5) ,12) ) ,7) ) ,-7) ,4) ) +transpose(((((transpose((X+transpose(X,7) ) ,-5) +transpose((X|X) ,4) ) +transpose(transpose(X,4) ,7) ) |(((X|X) +transpose((X+X) ,7) ) |transpose(transpose(X,4) ,4) ) ) +transpose(transpose(((step(X,12) +transpose(transpose(X,-5) ,12) ) |transpose(X,-7) ) ,4) ,4) ) ,7) ) ,-5) +transpose(transpose(((((transpose(arpeggio(X) ,4) +transpose((((echo(((arpeggio((X+X) ) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) +transpose((((X|X) +transpose(((X|X) +X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ,4,6) +transpose(transpose(X,4) ,4) ) +transpose(echo(((X+transpose(X,12) ) +transpose((X+transpose(X,12) ) ,7) ) ,4,6) ,7) ) |transpose((transpose(X,-5) +X) ,-7) ) ,12) ) +step((transpose((transpose(transpose((X|X) ,-7) ,4) +transpose(transpose(transpose(X,-5) ,-5) ,12) ) ,-5) +transpose((X+X) ,4) ) ,12) ) +arpeggio(transpose(transpose(shuffle((transpose(X,-5) +X) ) ,4) ,-5) ) ) +transpose((echo((echo((X+X) ,4,6) |transpose(echo((echo(X,4,6) +transpose(X,-5) ) ,4,6) ,-5) ) ,4,6) +(transpose(step(transpose((transpose(X,-5) +transpose(X,4) ) ,4) ,12) ,-7) |(((X+transpose(X,7) ) +transpose(shuffle(arpeggio(X) ) ,12) ) |(transpose(step((X+transpose(X,7) ) ,12) ,-5) +transpose(transpose((X|X) ,-7) ,-7) ) ) ) ) ,12) ) ,4) ,4) ) +transpose((((((((transpose(((transpose(X,-5) |shuffle(X) ) +((X|X) +transpose(step(X,12) ,12) ) ) ,-5) |step((((X+transpose(X,12) ) +(X+transpose(X,12) ) ) |transpose(shuffle(arpeggio(X) ) ,-5) ) ,12) ) +transpose((transpose(((step(X,12) +transpose((transpose(X,-7) +transpose(arpeggio(X) ,12) ) ,12) ) +transpose(transpose((X|X) ,-5) ,7) ) ,4) +((((transpose(transpose(X,-5) ,4) +transpose(arpeggio(X) ,4) ) +transpose((transpose(X,4) +transpose(arpeggio(X) ,12) ) ,7) ) +transpose((transpose(transpose(X,-5) ,4) +(transpose(step((X+transpose(X,7) ) ,12) ,-5) +transpose((X+transpose((X+X) ,12) ) ,12) ) ) ,4) ) +transpose(shuffle((transpose(echo((X+transpose(X,7) ) ,4,6) ,-7) +transpose(transpose(X,4) ,4) ) ) ,7) ) ) ,7) ) +transpose(((transpose((echo(X,4,6) +transpose(transpose(transpose(X,4) ,-5) ,7) ) ,4) +transpose(((transpose(step((X+transpose(shuffle(X) ,7) ) ,12) ,-7) +transpose((((step(transpose(X,-5) ,12) +transpose(X,4) ) +transpose((X+(X+transpose(X,12) ) ) ,7) ) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,7) ) +transpose((transpose(X,4) +echo((shuffle(X) +transpose((X|X) ,12) ) ,4,6) ) ,7) ) ,4) ) +transpose((((((((X+transpose(X,7) ) +(X|X) ) +transpose(((X|X) +transpose((X+((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,-5) ) |transpose(transpose(echo(X,4,6) ,-5) ,4) ) |(echo(X,4,6) +transpose((transpose((X|X) ,-7) +transpose(((X+transpose(X,7) ) +transpose(arpeggio(X) ,7) ) ,12) ) ,7) ) ) +transpose(arpeggio((((echo(transpose(X,4) ,4,6) +transpose(X,4) ) |(X|step(X,12) ) ) +transpose((transpose(X,-5) +transpose(X,4) ) ,12) ) ) ,4) ) +transpose(transpose(transpose(((((transpose(X,-7) +transpose(transpose(transpose(X,-5) ,-7) ,4) ) +transpose(X,7) ) +transpose(transpose(echo(X,4,6) ,-7) ,12) ) |(transpose(transpose(X,4) ,-7) |transpose(arpeggio((X+transpose(X,12) ) ) ,4) ) ) ,-7) ,-5) ,7) ) ,7) ) ,12) ) +transpose(step(echo(echo(step(X,12) ,4,6) ,4,6) ,12) ,4) ) +transpose((((shuffle(step(transpose((step(X,12) +transpose((transpose(echo(X,4,6) ,-7) +(transpose(X,-5) +X) ) ,7) ) ,-5) ,12) ) +transpose((((echo(X,4,6) +transpose(transpose((X+transpose(X,7) ) ,4) ,4) ) +transpose(echo(arpeggio(transpose(X,-5) ) ,4,6) ,7) ) +transpose((X+transpose(X,7) ) ,-7) ) ,12) ) +transpose(((transpose(X,-5) +transpose(transpose((X+step(X,12) ) ,-7) ,12) ) |(((X+X) +transpose((transpose(X,-7) |(X|X) ) ,12) ) +transpose(transpose(X,-5) ,12) ) ) ,4) ) +transpose(arpeggio(arpeggio((transpose(X,-7) +transpose(transpose(X,4) ,12) ) ) ) ,7) ) ,7) ) +transpose(transpose((((transpose((X|X) ,4) |shuffle(transpose((transpose(X,-7) +transpose((X+transpose(X,7) ) ,12) ) ,4) ) ) |transpose(echo(transpose((X|X) ,4) ,4,6) ,-5) ) +transpose((((((transpose(X,-7) +X) +echo(X,4,6) ) +transpose(arpeggio(X) ,7) ) +transpose((X+transpose(transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,-5) ,7) ) ,7) ) +transpose(echo((((transpose((X|X) ,4) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,12) ) |transpose(transpose(shuffle(X) ,-7) ,-7) ) ,4,6) ,12) ) ,4) ) ,4) ,4) ) +transpose(transpose(echo((arpeggio((X+transpose(X,7) ) ) +transpose(echo((echo((step(X,12) +X) ,4,6) +transpose(((X|X) +transpose(X,-7) ) ,7) ) ,4,6) ,12) ) ,4,6) ,-7) ,7) ) ,7) ) ,4) ) |((((((((shuffle(transpose(shuffle((X+transpose(X,7) ) ) ,-7) ) +transpose((arpeggio(step(transpose(step(arpeggio((X|X) ) ,12) ,4) ,12) ) +transpose(((echo(transpose(((transpose(X,-7) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) ,4) ,4,6) +transpose(arpeggio((transpose(X,4) |(shuffle(X) +transpose(X,12) ) ) ) ,12) ) +transpose(transpose(transpose(step(X,12) ,-7) ,4) ,12) ) ,7) ) ,7) ) |transpose(((step(echo((echo((X|X) ,4,6) +transpose(((echo(X,4,6) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ,12) ) ,4,6) ,12) +transpose(((((transpose(shuffle(X) ,-7) +transpose(transpose(((transpose((transpose(X,4) +transpose((X|X) ,7) ) ,-7) +transpose(transpose(X,4) ,12) ) +(transpose(X,4) +arpeggio(transpose(arpeggio(X) ,-5) ) ) ) ,4) ,7) ) +transpose((step(((((X+transpose(transpose(X,4) ,7) ) +transpose((X+transpose((X+transpose(X,12) ) ,7) ) ,4) ) +transpose((((X+X) +transpose(((X+X) +transpose(X,-5) ) ,4) ) +transpose(arpeggio(X) ,7) ) ,7) ) |echo(transpose((X|transpose(X,-5) ) ,-7) ,4,6) ) ,12) +step((step(X,12) |(X+transpose(X,12) ) ) ,12) ) ,4) ) +transpose((transpose(echo(step(X,12) ,4,6) ,-5) +transpose(transpose(((((transpose(arpeggio(X) ,-5) +transpose((X+transpose((X|X) ,7) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(((X|transpose(X,-7) ) +transpose(echo((X|X) ,4,6) ,7) ) ,7) ) +((X+X) |X) ) ,-5) ,7) ) ,7) ) +transpose((transpose(echo(transpose((echo(X,4,6) +shuffle(X) ) ,4) ,4,6) ,4) |shuffle((transpose(shuffle((X+transpose(X,12) ) ) ,-5) +(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) +(X+X) ) ) ) ) ,7) ) ,4) ) +transpose(((((shuffle((X+X) ) |transpose(X,4) ) +transpose((((X+X) |echo(X,4,6) ) +X) ,-7) ) +arpeggio(step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,12) ) ) +transpose(transpose(transpose(X,-7) ,-7) ,12) ) ,7) ) ,-5) ) +((transpose((arpeggio(arpeggio(transpose(transpose(step((X+transpose(X,7) ) ,12) ,-5) ,-5) ) ) +echo(transpose(transpose(((X|X) |transpose(X,4) ) ,4) ,4) ,4,6) ) ,-5) +transpose(transpose(transpose(((((step(transpose(X,-7) ,12) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose((((X+X) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,4) ,7) ) +transpose(transpose(arpeggio(X) ,-5) ,4) ) +transpose(transpose(transpose(echo(X,4,6) ,4) ,-7) ,7) ) ,-5) ,-7) ,4) ) +transpose(((step(step(transpose((((X+transpose(X,7) ) +transpose(shuffle(X) ,12) ) +transpose((echo(X,4,6) +transpose(X,7) ) ,12) ) ,4) ,12) ,12) +transpose(transpose(transpose(shuffle(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,-7) ,4) ,4) ) +transpose(step((transpose((X|transpose(X,4) ) ,-5) +transpose(transpose(transpose(transpose(X,-5) ,-5) ,-5) ,7) ) ,12) ,7) ) ,7) ) ) +((((((echo(X,4,6) +transpose(X,7) ) +transpose(transpose(arpeggio((X+transpose(X,12) ) ) ,4) ,12) ) +transpose(((((shuffle((X|X) ) +transpose(((X+X) +X) ,-5) ) |transpose(((X+transpose(X,7) ) |X) ,-5) ) +transpose((((X+transpose(X,7) ) +echo(arpeggio(X) ,4,6) ) +echo(((echo(X,4,6) +transpose(transpose(X,-7) ,4) ) +transpose(step(X,12) ,7) ) ,4,6) ) ,-7) ) +transpose(((transpose(shuffle(X) ,-5) |(transpose(transpose(X,-5) ,-5) +(transpose(X,-5) +transpose((X|X) ,12) ) ) ) +transpose((step(transpose(X,4) ,12) |transpose(X,-7) ) ,7) ) ,7) ) ,7) ) |transpose((transpose(((step(X,12) +transpose(X,7) ) +transpose(((transpose(X,-7) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ,4) +transpose((shuffle(transpose(X,4) ) +((transpose(X,-5) +echo(transpose(X,-7) ,4,6) ) +(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +X) ) ) ,12) ) ,-5) ) +echo(echo(step(((X|transpose(X,4) ) +(X|X) ) ,12) ,4,6) ,4,6) ) +((((((step(X,12) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) +transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ,4) ) +transpose(shuffle(transpose((X|X) ,-7) ) ,7) ) +transpose(((((X|X) +X) +transpose(transpose(X,4) ,4) ) +transpose((step(X,12) |(X+X) ) ,7) ) ,12) ) |(transpose((echo(transpose(X,4) ,4,6) |transpose(X,-5) ) ,4) +transpose(echo((shuffle((X|X) ) +step(((transpose(X,-5) +transpose(X,4) ) +transpose((X+X) ,7) ) ,12) ) ,4,6) ,12) ) ) |transpose(((((step((X+X) ,12) +transpose(transpose(((X+transpose(X,12) ) +transpose(transpose(X,-5) ,7) ) ,-5) ,12) ) |echo(arpeggio(echo(transpose(X,-5) ,4,6) ) ,4,6) ) +transpose(transpose(arpeggio((X|echo(X,4,6) ) ) ,4) ,12) ) +(((arpeggio(X) +((X+transpose(X,7) ) +transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,7) ) ) +(shuffle((X|X) ) |transpose((X+X) ,4) ) ) +transpose(echo((((transpose(X,-5) +transpose(X,7) ) +transpose(((step(X,12) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,4) ) +transpose(transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,4) ,7) ) ,4,6) ,7) ) ) ,4) ) ) ) +transpose(((shuffle(arpeggio(transpose(shuffle((transpose(echo(((X+X) +X) ,4,6) ,-7) |((transpose(((X+transpose(X,7) ) |X) ,-5) +transpose((shuffle((X+transpose((X+transpose(X,12) ) ,7) ) ) +transpose((((X+transpose(X,7) ) |X) |echo(X,4,6) ) ,7) ) ,4) ) +transpose((((step(X,12) +transpose((arpeggio(X) +transpose(transpose(X,-5) ,12) ) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose((X|(X+X) ) ,7) ) ,7) ) ) ) ,-7) ) ) +transpose(((transpose(transpose((transpose(transpose(((X|X) +X) ,-5) ,4) +shuffle(X) ) ,4) ,-7) +transpose(((((transpose((transpose(transpose(X,-7) ,-7) +transpose((((X+transpose((X+X) ,12) ) +transpose((X|transpose(X,-7) ) ,4) ) +transpose(transpose((X|X) ,-5) ,7) ) ,7) ) ,4) +transpose(echo(transpose(shuffle(transpose(X,4) ) ,4) ,4,6) ,7) ) +echo(echo(((((X|X) +transpose(X,4) ) +transpose(X,7) ) +((step(X,12) +transpose(X,12) ) |((echo(X,4,6) +transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ) ) ,4,6) ,4,6) ) +transpose(shuffle((transpose(transpose(transpose((transpose(X,-5) +transpose(arpeggio(X) ,7) ) ,4) ,4) ,-5) +transpose(echo((X+transpose(transpose(X,-7) ,7) ) ,4,6) ,12) ) ) ,4) ) +transpose(((transpose(transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) ,-7) |transpose((transpose((transpose(X,4) +(X|X) ) ,4) |transpose(transpose(X,4) ,-7) ) ,-7) ) |((shuffle(transpose(X,-7) ) |transpose(X,4) ) +((echo((X|(X+X) ) ,4,6) +transpose(((transpose((X+transpose(X,12) ) ,4) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,7) ) ,4) ) +transpose(transpose(transpose(transpose(X,4) ,-5) ,4) ,7) ) ,4) ) +transpose(arpeggio(transpose(X,-5) ) ,7) ) ) ) ,7) ) ,7) ) |((arpeggio((echo((X+transpose(X,12) ) ,4,6) +transpose(((transpose(transpose(X,4) ,4) |echo((X+X) ,4,6) ) |(shuffle(arpeggio((transpose(X,-5) |transpose(X,4) ) ) ) +transpose(X,4) ) ) ,7) ) ) +transpose((step((step(transpose(((X+X) +X) ,-7) ,12) +transpose(((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) +(X|X) ) +transpose(transpose(transpose(((arpeggio(X) +transpose(step(X,12) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ,-7) ,7) ) ,7) ) ,12) +transpose((((((shuffle(((transpose(X,4) +transpose(X,-5) ) |X) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,12) ) +((((transpose(X,-5) +transpose(X,12) ) +transpose((((step(X,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +step(X,12) ) ,4) ) +transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) +transpose(step(((arpeggio(X) +transpose(X,4) ) +transpose((X|X) ,7) ) ,12) ,12) ) ) +transpose(transpose(transpose(((step(X,12) +transpose((X+transpose((X+X) ,12) ) ,4) ) +transpose((X|transpose(X,-5) ) ,7) ) ,4) ,4) ,7) ) +((step((X|arpeggio(transpose(echo(X,4,6) ,-5) ) ) ,12) +transpose((transpose(((step(shuffle(X) ,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,-5) |echo(transpose(X,-5) ,4,6) ) ,12) ) |(arpeggio(X) +((transpose(X,4) +transpose(((echo(X,4,6) +transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose(echo(X,4,6) ,7) ) ,4) ) +transpose((((X|X) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ,4) ) +transpose(((X+transpose(transpose(X,4) ,12) ) +transpose((((X+transpose(X,12) ) +transpose((X+X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,7) ) ) ) ) +transpose(transpose((transpose(((shuffle(X) +transpose(transpose(X,-7) ,4) ) +transpose((((X+transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) |step(((transpose(X,-5) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,-7) ,12) ) ,7) ) ,4) ) +transpose((transpose((((((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(transpose((X|X) ,-7) ,7) ) +transpose(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(transpose((X+X) ,4) ,4) ) +transpose(arpeggio((X+X) ) ,7) ) ,12) ) +transpose(arpeggio(step(arpeggio(X) ,12) ) ,7) ) +transpose((echo((arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(arpeggio(X) ,7) ) ) +transpose(echo(X,4,6) ,7) ) ,4,6) +((X+X) |((X+transpose(X,12) ) |(((X|X) +transpose((X+transpose(X,7) ) ,7) ) |(X+transpose((X+transpose(X,7) ) ,7) ) ) ) ) ) ,7) ) ,-5) +transpose((transpose((((transpose((X+transpose(X,12) ) ,4) +(X+(X+transpose(X,12) ) ) ) +transpose(transpose((((X+transpose(X,12) ) +transpose(X,-5) ) +transpose(X,12) ) ,-7) ,12) ) +transpose(arpeggio(shuffle(X) ) ,12) ) ,4) +step(arpeggio(step(transpose(X,-5) ,12) ) ,12) ) ,7) ) ,7) ) ) ,4) ) +transpose((((transpose((echo((echo(transpose(X,-7) ,4,6) |transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) |((X|X) |X) ) ,-7) ) ,4,6) |(((transpose(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) ,-7) ,-7) +transpose((arpeggio((X+X) ) |(X+X) ) ,12) ) +transpose(((((X+transpose(X,12) ) +(X|X) ) +transpose(echo(transpose(X,4) ,4,6) ,12) ) |(shuffle(X) |transpose(X,-5) ) ) ,4) ) +transpose((transpose((X|X) ,-5) |shuffle(transpose(((X+X) +X) ,4) ) ) ,7) ) ) ,4) +(transpose(transpose(transpose(step(((transpose((X+transpose(X,7) ) ,4) +transpose((X+X) ,4) ) +transpose((X+transpose(transpose(X,4) ,12) ) ,7) ) ,12) ,-7) ,4) ,-5) |(((step(transpose(X,-7) ,12) +transpose(step(step(X,12) ,12) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((((transpose(X,-7) +transpose((X+transpose(X,7) ) ,-7) ) +transpose(((step(X,12) +X) |transpose((X+X) ,-5) ) ,4) ) +transpose(transpose(arpeggio(X) ,-7) ,7) ) ,7) ) ) ) +transpose(transpose(((((X|arpeggio((X|X) ) ) +transpose(((transpose(X,-7) +transpose(arpeggio(X) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) +transpose((((transpose(transpose(X,4) ,4) +transpose((X+transpose(X,7) ) ,12) ) |transpose(X,-5) ) +transpose(arpeggio(transpose((((transpose(transpose(X,-7) ,-7) +transpose(transpose(X,-7) ,4) ) +transpose(transpose((X+X) ,-7) ,7) ) +transpose((X|(echo(X,4,6) +transpose((X+transpose(X,7) ) ,12) ) ) ,12) ) ,-7) ) ,12) ) ,12) ) +transpose((transpose(((echo(((arpeggio((X|X) ) +transpose(transpose(X,-5) ,7) ) +transpose((transpose((X+transpose(X,7) ) ,4) |echo(X,4,6) ) ,12) ) ,4,6) +transpose(X,4) ) +transpose((((((X|X) +step(X,12) ) |(transpose(X,4) +transpose(X,7) ) ) +transpose((((X|X) |X) |(step(X,12) |transpose(X,-7) ) ) ,4) ) +transpose(echo(transpose(X,-5) ,4,6) ,7) ) ,7) ) ,-7) |(((transpose(X,-7) +step(X,12) ) |((X+((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(X,7) ) ) +((echo(X,4,6) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,7) ) ,7) ) +transpose(transpose(transpose(step(transpose(X,-7) ,12) ,4) ,-5) ,12) ) ) ) ,12) ) ,-7) ,4) ) +transpose((((((X|transpose(transpose((arpeggio(X) +transpose(transpose(X,-7) ,7) ) ,-7) ,-5) ) |((((step(X,12) |(X+transpose(X,12) ) ) +echo((step(X,12) +transpose((X|X) ,7) ) ,4,6) ) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(((arpeggio(X) +transpose(X,4) ) +transpose((X|transpose(X,4) ) ,7) ) ,-7) ,7) ) ) +transpose((echo((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,4) ) +transpose((X+X) ,7) ) +(X|X) ) ,4,6) +transpose(arpeggio(((transpose(X,-7) +transpose(transpose(transpose(X,-7) ,-7) ,4) ) +transpose((X|X) ,7) ) ) ,7) ) ,4) ) +transpose((echo((((X+transpose(X,12) ) +X) +transpose((shuffle((X+transpose(X,12) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) ,4,6) +transpose((arpeggio((((transpose(X,4) +transpose(transpose(transpose(X,4) ,-5) ,4) ) +transpose(shuffle(X) ,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(transpose(transpose(transpose(echo(X,4,6) ,4) ,-7) ,4) ,7) ) ,7) ) ,12) ) +transpose(((transpose(((transpose(step(X,12) ,-7) +(transpose(X,-5) +transpose(step(X,12) ,12) ) ) +transpose((transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,-7) +(transpose(transpose(X,4) ,-5) |echo(arpeggio(X) ,4,6) ) ) ,7) ) ,4) +transpose(transpose(((X+X) +transpose(((X+transpose(transpose(X,4) ,12) ) +(X|X) ) ,7) ) ,4) ,12) ) +step((X+transpose((shuffle(X) +transpose(X,-5) ) ,4) ) ,12) ) ,12) ) ,7) ) ,7) ) ,12) ) +transpose(echo(((transpose(transpose(((transpose(((transpose(transpose(X,-7) ,-5) +transpose((step(((X+transpose(X,7) ) |X) ,12) |transpose(step(transpose(X,-5) ,12) ,4) ) ,4) ) +transpose(transpose(shuffle(arpeggio((X+transpose(X,7) ) ) ) ,-5) ,7) ) ,4) +(transpose(shuffle(step((((X+transpose(X,4) ) |X) +transpose(arpeggio(((X|X) |(X+transpose(X,12) ) ) ) ,12) ) ,12) ) ,4) +(arpeggio(transpose(transpose(transpose(X,4) ,-5) ,4) ) |arpeggio((step(echo(X,4,6) ,12) +(X|((X+transpose(X,12) ) +X) ) ) ) ) ) ) +transpose(transpose((echo(transpose(((((arpeggio(shuffle(X) ) +transpose(((X+transpose((X|X) ,4) ) +transpose(X,7) ) ,12) ) +((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) |(X+transpose(X,12) ) ) ) +transpose(transpose(echo((X|X) ,4,6) ,-5) ,4) ) +transpose(transpose(((X+X) +transpose(((X+transpose(X,7) ) |X) ,12) ) ,4) ,7) ) ,4) ,4,6) +transpose(step(transpose(arpeggio(((X|(X+transpose(X,12) ) ) +transpose(transpose(shuffle(X) ,-7) ,7) ) ) ,-7) ,12) ,7) ) ,4) ,12) ) ,-5) ,-5) +transpose((transpose((arpeggio(((transpose(transpose((transpose(X,-7) |(X|X) ) ,-5) ,4) |(transpose(transpose(X,-7) ,4) +transpose((((X+transpose((X+transpose(X,7) ) ,7) ) +transpose(transpose(step(X,12) ,-7) ,7) ) |(echo(X,4,6) |(transpose(X,-5) +transpose(arpeggio(X) ,7) ) ) ) ,7) ) ) +echo((((X+X) +transpose(transpose(X,4) ,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(step(X,12) ,7) ) ,-7) ,12) ) ,4,6) ) ) +transpose(transpose(shuffle(echo((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) ,4,6) ) ,-7) ,7) ) ,-5) +transpose(step(transpose(step((shuffle(transpose((shuffle(X) +transpose(transpose(X,4) ,7) ) ,-7) ) +echo(((echo(transpose(((X+X) +X) ,4) ,4,6) +transpose(((transpose(X,-7) +transpose((X+transpose(X,-5) ) ,12) ) |transpose(X,4) ) ,4) ) +transpose(((shuffle((X+transpose(X,12) ) ) +transpose((arpeggio(X) |((X+transpose(X,12) ) +transpose(X,7) ) ) ,4) ) +transpose(transpose((((X+X) +transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) ,-7) ,7) ) ,7) ) ,4,6) ) ,12) ,-5) ,12) ,12) ) ,4) ) +transpose(shuffle(((shuffle((transpose(arpeggio((X+echo(transpose(X,-7) ,4,6) ) ) ,-7) +transpose((transpose(arpeggio(transpose(X,-5) ) ,-5) +(X+transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ) ,7) ) ) +(shuffle(((shuffle(transpose(transpose((X+transpose((X+X) ,7) ) ,4) ,4) ) +transpose(((step(transpose((X+X) ,4) ,12) +transpose(transpose(shuffle(transpose(X,4) ) ,-7) ,4) ) +transpose(transpose((X|X) ,-7) ,7) ) ,12) ) +transpose(echo((X+X) ,4,6) ,12) ) ) |((transpose((echo(X,4,6) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,-7) +transpose(shuffle(transpose(echo(shuffle(step(X,12) ) ,4,6) ,-7) ) ,4) ) +transpose(transpose(arpeggio(step(X,12) ) ,4) ,7) ) ) ) +echo(transpose((((((((((X|X) +transpose(X,4) ) +transpose((X|X) ,7) ) |(transpose(X,-5) +transpose((X|X) ,7) ) ) |((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(((X+transpose(X,12) ) +transpose(X,12) ) ,12) ) |(echo(X,4,6) |(transpose(X,-5) +transpose(X,-7) ) ) ) ) +transpose(step(step(transpose(X,-5) ,12) ,12) ,4) ) +transpose(((((X|X) +transpose((transpose(X,-5) +transpose(step(X,12) ,7) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) ,7) ) +transpose(transpose(step(X,12) ,-7) ,4) ) ,7) ) +transpose((((transpose(transpose(X,-7) ,-5) +transpose(transpose(transpose(((X|X) +transpose(X,12) ) ,-7) ,-7) ,4) ) +transpose(shuffle((step(X,12) +shuffle(X) ) ) ,7) ) +echo(((X+X) |transpose(X,4) ) ,4,6) ) ,12) ) +transpose((transpose(transpose(arpeggio(transpose(X,-5) ) ,-5) ,-7) +transpose(echo(transpose(transpose(transpose(((X+X) +transpose((X+transpose(X,7) ) ,12) ) ,-7) ,-7) ,-5) ,4,6) ,7) ) ,-7) ) ,4) ,4,6) ) ) ,7) ) ,4,6) ,4) ) +transpose(transpose(shuffle(transpose((transpose(echo(transpose((transpose(transpose(X,4) ,4) +(transpose((((transpose(X,4) |transpose(X,-7) ) +transpose(arpeggio(X) ,12) ) +((shuffle(X) +transpose((X|X) ,12) ) +transpose((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +transpose(X,7) ) ,12) ) ) ,4) |transpose((((X|X) +(((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ) +transpose(echo(transpose(X,-7) ,4,6) ,12) ) ,4) ) ) ,4) ,4,6) ,4) +transpose((step(arpeggio(shuffle(((arpeggio(transpose(X,-7) ) +arpeggio((X+transpose(X,12) ) ) ) |shuffle(transpose(transpose(X,-5) ,4) ) ) ) ) ,12) +transpose(shuffle(transpose((((shuffle((((transpose(X,4) +transpose(transpose(X,4) ,4) ) +transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,7) ) |(X+(X+transpose(transpose(X,4) ,7) ) ) ) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,12) ) +transpose((X+transpose(transpose(X,4) ,12) ) ,12) ) ,4) ) +transpose(shuffle((echo(X,4,6) +(X|(X+X) ) ) ) ,7) ) +transpose(transpose(((X+X) |(X+transpose(X,7) ) ) ,-5) ,7) ) ,-7) ) ,7) ) ,7) ) ,-5) ) ,4) ,7) ) +echo(echo(shuffle(step(arpeggio(transpose(arpeggio(shuffle(transpose(echo((echo(X,4,6) |((X|X) +X) ) ,4,6) ,-5) ) ) ,-7) ) ,12) ) ,4,6) ,4,6) ) )
random seed used was 99336077

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