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:
transpose(((((((transpose(transpose(step((((((shuffle(shuffle((X+transpose(X,12) ) ) ) +transpose((transpose(transpose(X,-5) ,-7) +step(X,12) ) ,12) ) +transpose(echo((((X+X) +transpose(X,7) ) |transpose(X,4) ) ,4,6) ,7) ) +(shuffle((transpose(X,4) +transpose((X+X) ,7) ) ) |((X+transpose(X,7) ) +(transpose(X,-5) +transpose(X,7) ) ) ) ) +transpose(shuffle(shuffle(echo(X,4,6) ) ) ,4) ) +transpose((step(transpose(echo(X,4,6) ,-5) ,12) +transpose(arpeggio(transpose(transpose((X+(X|X) ) ,-7) ,-5) ) ,12) ) ,7) ) ,12) ,4) ,-5) +transpose((((transpose((shuffle((transpose((transpose(X,4) |(X+X) ) ,-5) |transpose(echo(X,4,6) ,-7) ) ) +transpose(echo(transpose(step(((X+transpose(shuffle(X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,12) ,-5) ,4,6) ,12) ) ,-5) +transpose(shuffle((transpose(transpose(((transpose(X,-7) +transpose((step(X,12) +transpose(shuffle(((echo(X,4,6) |(X+transpose(X,7) ) ) +transpose(X,7) ) ) ,7) ) ,4) ) +transpose(arpeggio(shuffle((X|X) ) ) ,7) ) ,4) ,-5) +(((step((transpose((transpose(X,-7) +transpose((X+X) ,-5) ) ,4) +transpose(transpose(transpose((X|X) ,-5) ,4) ,7) ) ,12) |transpose(transpose(transpose(echo(X,4,6) ,-7) ,4) ,4) ) +transpose((shuffle((shuffle(transpose(X,-7) ) +(step(shuffle(X) ,12) |(transpose((X+transpose(X,12) ) ,4) +(transpose(X,-7) +transpose(X,7) ) ) ) ) ) +transpose(transpose((X|arpeggio(X) ) ,4) ,12) ) ,7) ) +((arpeggio(((X+((X+transpose(transpose(X,-5) ,4) ) +transpose((X|X) ,7) ) ) +transpose(((transpose(((X|X) |(X|transpose(X,-7) ) ) ,4) +transpose(shuffle(((transpose(X,-7) +transpose(arpeggio(X) ,12) ) +((X+transpose(X,12) ) +transpose(X,7) ) ) ) ,4) ) +transpose(shuffle((transpose(X,4) +X) ) ,7) ) ,12) ) ) +transpose(transpose(transpose((X+X) ,-5) ,-5) ,4) ) +transpose(echo((((shuffle(X) |(transpose((X|X) ,-5) |transpose((X|X) ,4) ) ) +((X+transpose(X,12) ) |arpeggio(X) ) ) +(transpose(X,4) +transpose(transpose(X,-7) ,12) ) ) ,4,6) ,7) ) ) ) ) ,4) ) +transpose(((transpose(transpose(shuffle(transpose(X,-5) ) ,-5) ,-5) +transpose(transpose((transpose(X,-5) |shuffle((X|X) ) ) ,4) ,-7) ) +transpose(shuffle(step(transpose(transpose(X,4) ,4) ,12) ) ,7) ) ,7) ) +shuffle((((shuffle(shuffle(transpose(step(step(X,12) ,12) ,4) ) ) +transpose(shuffle(shuffle(echo(X,4,6) ) ) ,4) ) +transpose(transpose(echo((transpose(X,-7) +transpose((((X+transpose(transpose(X,4) ,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ,4,6) ,-7) ,7) ) |((transpose(transpose((X|X) ,-7) ,-7) +transpose((transpose((X|X) ,-7) +((transpose(echo(X,4,6) ,-7) +transpose(X,7) ) +transpose(transpose(((X+X) |X) ,4) ,7) ) ) ,12) ) +transpose((transpose((((X+X) |shuffle(X) ) +(shuffle(X) |X) ) ,-7) +((((X|X) +transpose(X,12) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,4) ) +transpose((transpose((X+transpose(X,12) ) ,-7) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) ,7) ) ) ,4) ) ) ) ) ,7) ) +transpose(step(transpose(shuffle(((shuffle((transpose(transpose(transpose(X,4) ,-5) ,4) +(transpose((transpose((transpose(echo(X,4,6) ,-7) |((shuffle(X) +transpose(X,4) ) +transpose((X|X) ,7) ) ) ,4) +transpose(transpose((transpose(X,4) +transpose(X,7) ) ,4) ,-5) ) ,-5) +transpose(echo((step(step(shuffle(X) ,12) ,12) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,4,6) ,12) ) ) ) +transpose(transpose((step(transpose(step(step(step(X,12) ,12) ,12) ,4) ,12) +((transpose(arpeggio(X) ,-5) +(X|X) ) +transpose((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) +((X+transpose(X,12) ) +X) ) ,7) ) ) ,-7) ,7) ) |(transpose((shuffle((echo(X,4,6) |transpose(X,-7) ) ) +step((((transpose(X,4) +transpose(X,4) ) +transpose(arpeggio((X|X) ) ,7) ) |((step(transpose(arpeggio(X) ,4) ,12) +transpose(transpose(shuffle(X) ,4) ,4) ) +transpose(step(step(X,12) ,12) ,7) ) ) ,12) ) ,4) +transpose((echo((transpose(echo((transpose(arpeggio(shuffle(X) ) ,-5) +transpose((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) ,12) ) ,4,6) ,4) |transpose(transpose(transpose(transpose(X,-5) ,-7) ,-7) ,4) ) ,4,6) |transpose((transpose(step((X+transpose(X,-7) ) ,12) ,-7) |step((X|X) ,12) ) ,4) ) ,7) ) ) ) ,-7) ,12) ,4) ) +transpose((transpose(shuffle(((shuffle((transpose((shuffle(X) +transpose((shuffle(X) +transpose(arpeggio(step(X,12) ) ,12) ) ,12) ) ,4) +transpose(shuffle(X) ,-7) ) ) +transpose(transpose(shuffle(shuffle(echo(transpose(echo(X,4,6) ,-5) ,4,6) ) ) ,-5) ,4) ) +transpose((transpose(shuffle(echo(transpose((transpose(X,-7) +transpose((transpose(X,4) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ,4) ,4,6) ) ,-5) +transpose((transpose(X,-5) +transpose((((transpose(echo(X,4,6) ,-5) +transpose(shuffle(transpose(X,-5) ) ,12) ) |(transpose(X,-7) +arpeggio(((X+transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ) ) |shuffle((X+transpose(X,7) ) ) ) ,7) ) ,12) ) ,7) ) ) ,4) +transpose(transpose(arpeggio(transpose((transpose(shuffle(((X+X) +transpose(X,12) ) ) ,-5) +transpose(echo((X|((X+echo(X,4,6) ) +transpose(arpeggio(transpose(X,-5) ) ,7) ) ) ,4,6) ,12) ) ,-7) ) ,4) ,7) ) ,7) ) +transpose(((((transpose(step((transpose(shuffle((transpose(echo((X+transpose((X+X) ,12) ) ,4,6) ,4) +transpose((arpeggio(shuffle(X) ) +step(transpose(X,-7) ,12) ) ,7) ) ) ,-5) +transpose((echo(((shuffle(echo((((X+transpose(X,12) ) +transpose(X,7) ) +transpose(step(transpose(X,-5) ,12) ,7) ) ,4,6) ) +(X+(X+transpose((X+transpose(X,7) ) ,7) ) ) ) +transpose(shuffle(((X+X) +transpose(transpose(arpeggio(X) ,-7) ,12) ) ) ,12) ) ,4,6) |transpose((echo(transpose(transpose((shuffle(X) +(X+X) ) ,-7) ,4) ,4,6) +transpose(arpeggio((step(step(shuffle(X) ,12) ,12) |arpeggio(transpose((X|X) ,-7) ) ) ) ,7) ) ,4) ) ,7) ) ,12) ,-7) +transpose(((echo(step((transpose(transpose(((X+X) |(X|X) ) ,4) ,4) |(shuffle(shuffle(shuffle((X|X) ) ) ) |shuffle(shuffle(transpose(transpose(X,-5) ,-7) ) ) ) ) ,12) ,4,6) +transpose((shuffle(shuffle(shuffle(shuffle(transpose(shuffle((step(X,12) |X) ) ,4) ) ) ) ) +transpose(shuffle(echo(transpose(shuffle(X) ,-7) ,4,6) ) ,4) ) ,4) ) +transpose(shuffle(echo(transpose(shuffle(echo(((transpose((X|X) ,-5) +transpose(shuffle(transpose(X,4) ) ,12) ) +transpose(arpeggio(X) ,-7) ) ,4,6) ) ,-7) ,4,6) ) ,7) ) ,4) ) +transpose(((((((transpose(((transpose(X,-5) +transpose(transpose((X|X) ,-7) ,12) ) |(step(transpose(arpeggio((X+X) ) ,-7) ,12) +transpose(transpose(shuffle(X) ,-5) ,12) ) ) ,4) +transpose(echo((shuffle((transpose(echo(transpose(X,4) ,4,6) ,4) +transpose(transpose(transpose(transpose(X,-5) ,-7) ,4) ,4) ) ) +(step(shuffle(X) ,12) +transpose(transpose((X+step((X+transpose(X,7) ) ,12) ) ,4) ,7) ) ) ,4,6) ,4) ) +transpose(transpose((transpose(transpose(step(shuffle(transpose((arpeggio(X) |(X+transpose(X,7) ) ) ,-5) ) ,12) ,4) ,-7) +((transpose(transpose(X,-7) ,-5) +transpose((((X+transpose(X,12) ) +transpose(((X+transpose(X,7) ) +X) ,4) ) +transpose((X+X) ,7) ) ,12) ) +transpose(transpose(shuffle(((step(X,12) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,4) ,7) ) ) ,-5) ,12) ) ) ,-7) ,7) ) +transpose(transpose(transpose((shuffle((X+transpose(transpose(X,-7) ,7) ) ) +transpose((((transpose((X+X) ,4) +transpose(transpose(shuffle(X) ,-7) ,12) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ) +step(transpose(X,4) ,12) ) ,12) ) ,-5) ,4) ,4) ) +transpose((transpose(transpose(shuffle((transpose(arpeggio(X) ,4) |transpose(transpose(X,-7) ,-7) ) ) ,-7) ,-5) |(transpose((transpose((transpose(X,-5) |shuffle(X) ) ,-7) |(((((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) +(X+transpose(X,4) ) ) |echo((transpose(transpose(X,-5) ,-7) |(X+(X|X) ) ) ,4,6) ) ) ,4) |arpeggio(((transpose(shuffle(transpose(X,4) ) ,-5) +transpose(transpose(shuffle(X) ,4) ,4) ) +transpose(((((X+X) +transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose(((X|X) +transpose((echo(X,4,6) |(X+transpose(X,12) ) ) ,7) ) ,-5) ) ,7) ) ) ) ) ,7) ) +step(transpose(arpeggio((transpose(echo(X,4,6) ,-5) |(shuffle((X|X) ) +transpose(transpose(step(X,12) ,4) ,-7) ) ) ) ,-7) ,12) ) +transpose(((step(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(shuffle((X+X) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,12) +transpose(transpose((transpose((shuffle((transpose(X,4) |X) ) +transpose((transpose((transpose(X,4) |(X+X) ) ,-5) |(X|X) ) ,12) ) ,4) |arpeggio((echo(shuffle(arpeggio(X) ) ,4,6) +transpose((transpose((transpose((X|X) ,-5) +transpose(shuffle(X) ,7) ) ,-7) |X) ,7) ) ) ) ,4) ,7) ) +transpose(shuffle(transpose(transpose(((transpose(X,-7) +(((X+transpose(X,12) ) +transpose(echo(transpose(X,4) ,4,6) ,7) ) +transpose(transpose((step(X,12) +transpose(X,4) ) ,-7) ,4) ) ) +step(((transpose(transpose(X,-5) ,-5) +transpose((step((X+(X+transpose(X,12) ) ) ,12) |step((X+X) ,12) ) ,7) ) +transpose(((X+X) +transpose(transpose((X+transpose(X,7) ) ,-5) ,12) ) ,-7) ) ,12) ) ,4) ,-5) ) ,12) ) ,12) ) ,7) ) +transpose(echo((transpose(((transpose(step(transpose((transpose(arpeggio(X) ,-5) +transpose(transpose(((transpose(X,-5) +transpose((X+X) ,4) ) +transpose(X,7) ) ,-7) ,7) ) ,4) ,12) ,-5) +transpose(arpeggio(step(shuffle(X) ,12) ) ,4) ) +transpose(arpeggio(arpeggio(step((shuffle((X+transpose(X,12) ) ) |transpose(X,-7) ) ,12) ) ) ,7) ) ,-5) +shuffle(transpose(echo(transpose(shuffle(X) ,-7) ,4,6) ,-5) ) ) ,4,6) ,4) ) +transpose(step(((transpose((((X+transpose(transpose(transpose(transpose(X,-7) ,-5) ,4) ,4) ) +transpose((((X+transpose(step(X,12) ,12) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-7) ,7) ) ,7) ) +transpose(shuffle(transpose(shuffle((X+transpose(X,7) ) ) ,-5) ) ,12) ) ,-5) +transpose((((step(transpose(X,-5) ,12) +transpose(shuffle(X) ,4) ) +transpose(step(X,12) ,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,12) ) ,12) ) +((step(step(echo(shuffle(transpose((shuffle(X) +transpose((X|X) ,7) ) ,-7) ) ,4,6) ,12) ,12) |shuffle(transpose((((echo(transpose((X+X) ,-7) ,4,6) +transpose(((((X+transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) |transpose(X,-5) ) +transpose(transpose(X,-5) ,-5) ) ,7) ) +transpose(step(transpose((((X+transpose(X,4) ) +transpose(X,7) ) |(X|X) ) ,-5) ,12) ,4) ) +transpose(transpose(transpose((X+transpose((X+X) ,12) ) ,4) ,-7) ,7) ) ,4) ) ) +(((((transpose(shuffle(X) ,-5) +((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(echo(shuffle(X) ,4,6) ,7) ) +shuffle(((echo((X+transpose(X,12) ) ,4,6) +transpose((X|(X+transpose(X,7) ) ) ,4) ) +transpose((arpeggio(X) +transpose(X,7) ) ,7) ) ) ) ) +transpose((((((X+transpose(transpose(X,-5) ,12) ) +echo(X,4,6) ) +transpose(transpose(echo(X,4,6) ,-5) ,4) ) +transpose(shuffle((X+(X|X) ) ) ,7) ) +transpose(echo(shuffle(transpose((X+X) ,-7) ) ,4,6) ,12) ) ,12) ) +transpose(transpose(transpose(((transpose(X,-5) +transpose(shuffle(X) ,4) ) +transpose(X,7) ) ,-7) ,-7) ,4) ) +transpose(((step(((transpose(((X+transpose(X,7) ) +transpose((X+X) ,-5) ) ,-5) +transpose((X+transpose(transpose(X,-5) ,4) ) ,4) ) +transpose(((X|step(X,12) ) +transpose(step(X,12) ,12) ) ,7) ) ,12) +transpose((((echo((echo(X,4,6) +transpose(X,7) ) ,4,6) +transpose(transpose(shuffle((X+X) ) ,-7) ,4) ) +transpose(echo(X,4,6) ,7) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose((shuffle((transpose(X,-5) +transpose(X,4) ) ) +echo(shuffle(step(X,12) ) ,4,6) ) ,7) ) ,7) ) +transpose(step(transpose(transpose(((transpose(X,-7) |X) +(X|X) ) ,-7) ,-7) ,12) ,7) ) ) ) ,12) ,7) ) ,12) ) +transpose((((shuffle(transpose(transpose(echo(transpose((((X+transpose(((echo((X+X) ,4,6) +transpose(shuffle(X) ,12) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) +transpose(((X+transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +X) +transpose(X,12) ) |((X+transpose((X+X) ,4) ) +transpose(X,7) ) ) ,12) ) ,4) ) +transpose((arpeggio((X|X) ) |(transpose(((echo(X,4,6) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ,-7) |step(transpose(X,-5) ,12) ) ) ,7) ) ,4) ,4,6) ,4) ,-7) ) |(((echo(transpose(transpose(transpose(shuffle(X) ,4) ,4) ,-7) ,4,6) +(transpose(transpose((shuffle(((transpose(X,-7) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ) +transpose((step(X,12) +step(X,12) ) ,12) ) ,4) ,4) +transpose(transpose((shuffle(transpose(shuffle(X) ,4) ) +(step(transpose(echo(X,4,6) ,-5) ,12) +(((X|X) +transpose((step(X,12) +transpose(X,12) ) ,4) ) +transpose(shuffle((X+X) ) ,7) ) ) ) ,4) ,12) ) ) +transpose(transpose(transpose(echo(arpeggio(((transpose((transpose(X,4) +X) ,-5) +transpose((transpose((X|X) ,4) +transpose(((X+transpose(shuffle(X) ,4) ) +transpose(X,7) ) ,12) ) ,7) ) +arpeggio((shuffle(X) +transpose(X,12) ) ) ) ) ,4,6) ,-7) ,-7) ,-5) ) +transpose(shuffle(transpose(transpose(transpose(transpose(arpeggio(transpose(shuffle(X) ,-7) ) ,-5) ,-7) ,-5) ,4) ) ,12) ) ) |((transpose((transpose(transpose((shuffle((transpose((transpose((X+transpose(X,7) ) ,-7) |((X+transpose(transpose(X,-5) ,12) ) +(X+transpose(X,-5) ) ) ) ,-5) |transpose(arpeggio(X) ,4) ) ) |((transpose(((shuffle(X) +(X|X) ) |((X|X) |transpose(X,-5) ) ) ,4) +transpose((transpose(transpose(X,-5) ,-7) +transpose(transpose((X+transpose(X,-5) ) ,-5) ,12) ) ,4) ) +transpose(shuffle(transpose(X,-7) ) ,7) ) ) ,4) ,-7) +transpose((transpose(((transpose((transpose(X,-5) +transpose(X,7) ) ,4) |transpose((echo((transpose(X,4) +transpose(X,7) ) ,4,6) +(shuffle(X) +transpose((X+transpose(X,7) ) ,-7) ) ) ,-5) ) +(shuffle(step(X,12) ) +transpose(transpose(X,4) ,12) ) ) ,-5) +transpose(transpose(step(((((shuffle(X) |X) +transpose(X,4) ) +transpose(arpeggio(transpose(X,-5) ) ,7) ) +transpose(((X+transpose(X,12) ) +transpose(X,12) ) ,7) ) ,12) ,-7) ,7) ) ,12) ) ,-7) +transpose(transpose(transpose((((shuffle(shuffle(transpose(((((X+transpose(transpose(transpose(X,-7) ,4) ,7) ) |((transpose(X,-5) +transpose(X,12) ) +step(X,12) ) ) +transpose(echo(shuffle(transpose(X,-7) ) ,4,6) ,4) ) +transpose((step((X+transpose(shuffle(X) ,-5) ) ,12) |shuffle(shuffle(X) ) ) ,7) ) ,4) ) ) +transpose(arpeggio(arpeggio(transpose(transpose(transpose(echo(X,4,6) ,-7) ,4) ,-5) ) ) ,12) ) +transpose(step(arpeggio(arpeggio((transpose(transpose(X,-5) ,4) +transpose(transpose(((((X+transpose(X,7) ) +transpose(X,4) ) |arpeggio((transpose(X,4) +transpose(X,7) ) ) ) +transpose(X,7) ) ,4) ,12) ) ) ) ,12) ,4) ) +transpose((shuffle(step((transpose(transpose(X,-5) ,4) +(transpose(X,-5) |transpose(X,4) ) ) ,12) ) |(shuffle(transpose(transpose(echo(X,4,6) ,-5) ,-5) ) |(transpose(transpose((arpeggio(X) +transpose(shuffle(X) ,12) ) ,4) ,4) +transpose(transpose(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) ,-5) ,12) ) ) ) ,7) ) ,-7) ,-7) ,4) ) +transpose(transpose((transpose(((arpeggio(shuffle(transpose(transpose(((X|(X+transpose(X,7) ) ) +shuffle(X) ) ,-5) ,-5) ) ) +transpose(transpose((echo(transpose(X,4) ,4,6) |transpose(transpose(X,-5) ,-7) ) ,-7) ,12) ) +(shuffle(transpose((X+transpose(X,12) ) ,-5) ) |((((transpose(shuffle(X) ,4) +transpose(transpose(transpose(X,4) ,4) ,4) ) +transpose(step(((X|X) +transpose((X+transpose(X,7) ) ,12) ) ,12) ,7) ) +step((((X|X) +transpose((X|X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,12) ) +transpose(((X+transpose(step(X,12) ,4) ) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) ,7) ) ) ) ,4) |(echo(arpeggio((((shuffle(arpeggio(X) ) |echo((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ,4,6) ) +transpose(transpose((((X+X) +transpose((X|X) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-5) ,4) ) +transpose(((((X+X) +transpose(transpose(X,-7) ,12) ) +transpose(shuffle(X) ,4) ) +transpose((transpose(X,4) +transpose(echo(X,4,6) ,12) ) ,7) ) ,7) ) ) ,4,6) +transpose((transpose(transpose(X,-7) ,-7) +transpose(shuffle(transpose(X,-5) ) ,4) ) ,12) ) ) ,-7) ,7) ) ) |((shuffle(shuffle(step(((transpose(((step(X,12) +(transpose((shuffle(X) +shuffle(X) ) ,-5) |shuffle(echo(X,4,6) ) ) ) +(echo((transpose((X|X) ,4) +shuffle(X) ) ,4,6) |(transpose(X,-7) |X) ) ) ,-7) |transpose(shuffle((transpose(transpose(X,-7) ,-7) +transpose(X,-5) ) ) ,-7) ) +transpose(((transpose((transpose(X,4) +(transpose(X,-5) |(X|X) ) ) ,-5) +transpose(transpose(transpose(shuffle(X) ,-7) ,4) ,4) ) +transpose(step(transpose((transpose(X,-7) +transpose(shuffle(shuffle(X) ) ,7) ) ,-7) ,12) ,7) ) ,-7) ) ,12) ) ) +transpose(transpose((shuffle(transpose(transpose(((shuffle(X) +transpose((echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(shuffle(step((X|X) ,12) ) ,7) ) ,-7) ,-5) ) |transpose(shuffle(transpose((((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(arpeggio(((X|X) +transpose(X,12) ) ) ,7) ) ,4) ) ,4) ) ,-7) ,4) ) +transpose((transpose((transpose(shuffle(arpeggio(step((transpose(step(transpose((step(X,12) +transpose(X,7) ) ,4) ,12) ,4) |step(transpose((transpose(X,4) +transpose(X,12) ) ,-5) ,12) ) ,12) ) ) ,-5) +arpeggio((transpose(echo(shuffle(X) ,4,6) ,-5) |(arpeggio((transpose(shuffle(shuffle(X) ) ,-5) +shuffle((X+X) ) ) ) |(echo(((transpose(X,4) +transpose(shuffle(X) ,4) ) +transpose(step(X,12) ,7) ) ,4,6) +transpose(shuffle(((shuffle(transpose(X,4) ) +transpose((X|X) ,4) ) +transpose(transpose(shuffle(X) ,-5) ,7) ) ) ,7) ) ) ) ) ) ,4) +transpose(transpose(((((transpose(echo((((X+transpose(X,4) ) +transpose(X,7) ) +arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,4,6) ,4) +transpose(shuffle(transpose(transpose(X,4) ,-7) ) ,4) ) +transpose(shuffle((X|X) ) ,7) ) +transpose(echo(shuffle((echo(step(arpeggio(X) ,12) ,4,6) +(((((X+transpose(X,7) ) |shuffle(X) ) +transpose((X|step(X,12) ) ,4) ) +transpose(shuffle(X) ,7) ) +(X|(X|X) ) ) ) ) ,4,6) ,7) ) +transpose(step(echo(arpeggio(transpose(X,-5) ) ,4,6) ,12) ,12) ) ,-5) ,12) ) ,7) ) ) ,12) ) |shuffle(step((step((((transpose(shuffle(step(arpeggio(X) ,12) ) ,-5) |shuffle(((transpose(transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) ,-5) ,-5) +transpose(((transpose(((step(shuffle(X) ,12) +transpose((X+transpose(X,7) ) ,4) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) ,-5) +transpose((echo((X|X) ,4,6) +transpose(step(shuffle(X) ,12) ,12) ) ,4) ) +transpose(shuffle(transpose(X,4) ) ,7) ) ,7) ) +transpose(transpose((X+(X|(X+X) ) ) ,-7) ,7) ) ) ) +transpose(transpose(transpose(((X+transpose(X,12) ) |(step(X,12) +transpose((((X|X) +transpose((X+X) ,4) ) +transpose((X+X) ,7) ) ,12) ) ) ,4) ,-7) ,12) ) +(echo(((shuffle(transpose(X,4) ) +transpose(arpeggio(X) ,4) ) +transpose((X+X) ,7) ) ,4,6) +transpose(echo((((transpose(X,-5) |(X+X) ) +transpose((X|X) ,4) ) +transpose(step(X,12) ,7) ) ,4,6) ,-5) ) ) ,12) +transpose((arpeggio((((((((transpose(X,4) +X) |transpose(echo(X,4,6) ,-5) ) +transpose((((transpose((X|X) ,4) +X) +transpose((transpose(X,-7) +X) ,-7) ) |(echo(transpose(X,4) ,4,6) +transpose(transpose(X,-7) ,7) ) ) ,4) ) +transpose(transpose(arpeggio(transpose((X+transpose(X,7) ) ,-5) ) ,-5) ,7) ) +transpose(transpose(echo(transpose(transpose(X,-5) ,-5) ,4,6) ,-7) ,7) ) +transpose(((transpose(arpeggio(((X|shuffle(X) ) +transpose(X,12) ) ) ,-7) +transpose(shuffle((transpose((step(X,12) +transpose((X+transpose(X,12) ) ,7) ) ,-5) +(X|(X|X) ) ) ) ,4) ) +transpose(transpose(transpose((X|X) ,-5) ,4) ,7) ) ,12) ) +transpose(echo(transpose(transpose((X|X) ,4) ,4) ,4,6) ,-5) ) ) +(transpose(((transpose((transpose(arpeggio(X) ,4) +shuffle((transpose(X,4) +X) ) ) ,-7) +shuffle((((shuffle(transpose(shuffle(X) ,-5) ) +transpose(transpose((((X+transpose(X,7) ) |X) +X) ,-5) ,7) ) +transpose((((X|X) |shuffle(X) ) +transpose(X,12) ) ,4) ) +transpose(((step(((X+transpose((X|X) ,4) ) +transpose(X,7) ) ,12) +transpose(transpose(transpose(X,-5) ,4) ,4) ) +transpose(transpose(X,4) ,7) ) ,7) ) ) ) +transpose(transpose((echo(step(X,12) ,4,6) +transpose(((arpeggio((X+X) ) |shuffle(X) ) |(step(X,12) +transpose(transpose(X,4) ,4) ) ) ,12) ) ,-5) ,12) ) ,-5) +transpose((((transpose(step(X,12) ,4) +transpose(X,4) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) +transpose((((X|X) +transpose(X,7) ) +X) ,4) ) ,7) ) ) ,12) ) ,12) ) ) ,-7)
random seed used was 165315921

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