Tune Toys : Expresso

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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.

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After 20 generations the expression "X" became this:

((shuffle(transpose(arpeggio(transpose(step(((echo(transpose(((X+transpose(X,7) ) |echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ,4) ,4,6) +transpose((transpose(transpose(transpose(arpeggio(X) ,-7) ,4) ,4) |shuffle(transpose((shuffle(X) +transpose((X+transpose(transpose(X,4) ,12) ) ,7) ) ,-5) ) ) ,4) ) +transpose((transpose(((step(shuffle(echo(X,4,6) ) ,12) +transpose(transpose(transpose(shuffle((X|(X|X) ) ) ,-7) ,-5) ,4) ) +transpose((((X+step(X,12) ) |(step((X+X) ,12) +arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ) +transpose(X,12) ) ,7) ) ,4) +(transpose(((transpose(X,4) +transpose(transpose(X,-5) ,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) +transpose(shuffle((step(X,12) +transpose(transpose(X,-7) ,4) ) ) ,12) ) ) ,7) ) ,12) ,-7) ) ,-7) ) +transpose((step(transpose(((shuffle(transpose(transpose((((step(X,12) +(echo(step((X+transpose((X+transpose(X,7) ) ,12) ) ,12) ,4,6) +transpose(((transpose(X,4) +transpose(step(X,12) ,12) ) +transpose((echo(X,4,6) |((X|X) |X) ) ,7) ) ,7) ) ) +transpose(transpose(echo(transpose(transpose((X+transpose(X,12) ) ,-7) ,4) ,4,6) ,4) ,4) ) +transpose(((arpeggio((X+transpose(X,12) ) ) +step((X+(X|X) ) ,12) ) +transpose(transpose(transpose((transpose(X,4) +transpose(X,12) ) ,4) ,4) ,7) ) ,7) ) ,-7) ,-5) ) +transpose(transpose(echo(((transpose(transpose(shuffle(transpose(X,-7) ) ,4) ,-7) +transpose(step((transpose(transpose((X|X) ,-7) ,4) |(transpose(X,-7) |(transpose(X,4) +X) ) ) ,12) ,4) ) +transpose((((transpose((step(transpose(shuffle(shuffle((X+transpose(X,12) ) ) ) ,4) ,12) +transpose((((arpeggio(transpose(transpose(X,4) ,4) ) +transpose(((X|X) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(transpose(transpose(X,4) ,4) ,7) ) +(X|X) ) ,12) ) ,-7) +transpose((transpose(((X+X) +transpose((X+(X|X) ) ,7) ) ,-5) +transpose(((((((X+transpose(step(X,12) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose((transpose(X,4) +transpose(shuffle(X) ,7) ) ,7) ) +transpose((((X+X) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose((X+transpose((X|X) ,-7) ) ,7) ) +((echo(shuffle(X) ,4,6) +transpose(echo(echo(X,4,6) ,4,6) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ,12) ) ,4) ) +transpose(((arpeggio(step(X,12) ) +X) +transpose(((transpose(X,-7) +transpose((echo(X,4,6) +X) ,7) ) |echo(arpeggio(transpose(X,4) ) ,4,6) ) ,12) ) ,7) ) +transpose((transpose((((X+X) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,4) +transpose(step(((X+X) +transpose(transpose((X|X) ,4) ,12) ) ,12) ,7) ) ,4) ) ,7) ) ,4,6) ,-7) ,4) ) +transpose(((((echo((step(X,12) |((((((X+X) +transpose(transpose(arpeggio(X) ,-5) ,4) ) +transpose(transpose((X+transpose(X,12) ) ,4) ,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(step(echo((X+X) ,4,6) ,12) ,7) ) +((transpose(X,-7) +((X+transpose((X+transpose(X,12) ) ,12) ) |transpose(X,4) ) ) +transpose(step((X+transpose(X,7) ) ,12) ,12) ) ) ) ,4,6) |echo(transpose(transpose(transpose(((X|transpose(X,-7) ) +transpose(((X+transpose(X,12) ) |X) ,7) ) ,-5) ,-5) ,-7) ,4,6) ) +transpose(transpose(((transpose(arpeggio((X+transpose(shuffle(X) ,7) ) ) ,4) +shuffle(transpose(echo((transpose(X,4) |X) ,4,6) ,-7) ) ) |shuffle((transpose((arpeggio((X|X) ) +transpose((X+(X+transpose(X,7) ) ) ,12) ) ,-5) +transpose(transpose((X+transpose(X,12) ) ,4) ,12) ) ) ) ,4) ,12) ) |(step((transpose((transpose(transpose(transpose(X,4) ,4) ,4) +transpose((((shuffle((step(X,12) |(X|X) ) ) +transpose(((X|X) +transpose(step(X,12) ,7) ) ,4) ) +transpose(transpose(shuffle(X) ,4) ,7) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((transpose(X,4) +transpose(X,12) ) ,12) ) ,4) ) ,12) ) ,4) +transpose((shuffle(((((shuffle(transpose(X,4) ) |(step(X,12) |(transpose(X,4) |echo(X,4,6) ) ) ) +transpose(arpeggio(X) ,4) ) +transpose((((X+X) +X) +transpose(X,12) ) ,7) ) |transpose((transpose(((X+transpose(X,12) ) +transpose(X,4) ) ,-7) +transpose(X,4) ) ,-5) ) ) |step(((((X+transpose((X|X) ,7) ) +transpose(arpeggio(transpose(((X+X) +transpose(transpose(X,-5) ,7) ) ,-7) ) ,4) ) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) +transpose(echo(transpose(transpose((X+transpose(X,12) ) ,4) ,-7) ,4,6) ,7) ) ,12) ) ,12) ) ,12) +transpose((transpose(arpeggio(shuffle(step(transpose((echo(X,4,6) +transpose(step(X,12) ,12) ) ,-5) ,12) ) ) ,-5) |((((step((transpose((X+transpose(X,12) ) ,4) +shuffle(X) ) ,12) +transpose(((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) |echo(echo(echo(X,4,6) ,4,6) ,4,6) ) ,7) ) +(transpose(X,-5) +((transpose((X+X) ,-7) +transpose(((X+transpose(X,12) ) |transpose(X,-7) ) ,4) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) ) ) +(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +transpose((step(X,12) |(X|X) ) ,4) ) +transpose(shuffle(((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,7) ) |transpose(transpose(X,4) ,4) ) ) +transpose((shuffle(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(X,-7) ,7) ) ) +(transpose(X,4) +((X+transpose(X,12) ) +(X+transpose(X,12) ) ) ) ) ,12) ) ) ,12) ) ) |transpose((transpose(((transpose((transpose(X,4) |arpeggio(X) ) ,4) +transpose((X+transpose(X,12) ) ,7) ) +(transpose((step(((X+X) |X) ,12) +transpose(step(transpose(transpose(X,-7) ,-5) ,12) ,-7) ) ,4) +transpose((X+transpose((X+X) ,12) ) ,12) ) ) ,-5) |transpose((echo((step(step((X+transpose(X,12) ) ,12) ,12) +arpeggio(step(X,12) ) ) ,4,6) +transpose((arpeggio((transpose(X,4) |transpose((X+X) ,-7) ) ) |(((transpose(X,-7) +transpose((X+transpose(X,7) ) ,7) ) +transpose(transpose(((transpose(X,-5) |X) |X) ,-5) ,4) ) +transpose(((X+X) +((X+transpose(X,12) ) |(shuffle(X) |X) ) ) ,7) ) ) ,-7) ) ,-7) ) ,-7) ) ,7) ) ,-7) ,12) +echo(((((((transpose(transpose(transpose(step((X|X) ,12) ,4) ,4) ,-7) +transpose(transpose(((((step(X,12) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) |(X+transpose(X,4) ) ) +transpose(((((transpose(X,4) |echo(X,4,6) ) +transpose(((X+transpose(X,7) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(X,7) ) +transpose(step(X,12) ,-7) ) ,7) ) ,-7) ,4) ) +transpose(step(transpose(transpose(shuffle(X) ,4) ,4) ,12) ,7) ) +transpose(transpose((((X|((echo(transpose(X,-7) ,4,6) +transpose((X+transpose(X,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) ) +transpose(((transpose(arpeggio(X) ,-7) +transpose(echo((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,4,6) ,12) ) +transpose(transpose((X|X) ,-5) ,7) ) ,4) ) +transpose(shuffle(((((X+X) +transpose(X,12) ) +echo(transpose(X,4) ,4,6) ) +transpose(step((X+(X+transpose(X,12) ) ) ,12) ,7) ) ) ,7) ) ,4) ,7) ) +transpose(echo((transpose(shuffle((X+X) ) ,-5) +transpose(echo(X,4,6) ,4) ) ,4,6) ,4) ) +transpose(transpose(transpose(transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,-5) ,4) ,4) ,7) ) +((transpose(((transpose(((step(((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,12) +echo((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+X) |transpose(X,4) ) ,7) ) ,4,6) ) +step((transpose(step(X,12) ,-7) |arpeggio(X) ) ,12) ) ,4) |(step(transpose(shuffle((X|step(X,12) ) ) ,-7) ,12) +transpose(transpose(transpose(transpose(echo((arpeggio(X) +transpose(X,4) ) ,4,6) ,-5) ,4) ,-5) ,7) ) ) +transpose(transpose(((((transpose(transpose((transpose(X,-5) |X) ,-7) ,-7) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(shuffle((echo(X,4,6) |(X|(X|X) ) ) ) ,4) ) +transpose(echo(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,-7) ) ,-7) ,4,6) ,7) ) ,4) ,12) ) ,4) +transpose((step((((transpose(((step(X,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X|transpose(X,-7) ) ,7) ) ,-5) +transpose(((transpose(transpose(X,-5) ,4) +transpose(transpose(X,4) ,12) ) +transpose(step(((transpose(X,-7) +transpose(X,7) ) |(X+transpose(X,12) ) ) ,12) ,12) ) ,-7) ) +transpose(echo((transpose((transpose(X,4) +shuffle((X+transpose(X,12) ) ) ) ,4) |transpose(echo(X,4,6) ,-7) ) ,4,6) ,4) ) +transpose((transpose(transpose(shuffle(X) ,-7) ,-5) |transpose(arpeggio(arpeggio((transpose(X,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ) ,-5) ) ,7) ) ,12) +transpose(((((step(transpose(X,-7) ,12) +transpose(X,4) ) +transpose((transpose(X,-7) |X) ,7) ) |(arpeggio(((X|X) +transpose((X+X) ,12) ) ) |(shuffle(arpeggio((X+transpose(X,7) ) ) ) +transpose(step(X,12) ,-7) ) ) ) +shuffle(arpeggio(transpose((transpose(echo(X,4,6) ,-7) |(X|X) ) ,-5) ) ) ) ,-7) ) ,7) ) +((((shuffle(transpose(echo(transpose(transpose(X,4) ,4) ,4,6) ,-5) ) +transpose((transpose(shuffle(X) ,-5) +shuffle(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ,7) ) |transpose((step((((X+transpose(X,4) ) +transpose(X,7) ) +((transpose(shuffle(X) ,4) +transpose(X,4) ) +transpose(((X+transpose((X+X) ,7) ) +transpose(echo(X,4,6) ,7) ) ,12) ) ) ,12) +transpose(echo(transpose(arpeggio(transpose(transpose(X,4) ,-5) ) ,4) ,4,6) ,7) ) ,-7) ) +transpose(transpose(transpose(arpeggio(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,-7) ,4) ,4) ) |(transpose(arpeggio(transpose(((transpose(transpose(X,4) ,-7) +transpose(((((((X+X) +transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,12) ) +transpose(arpeggio(transpose(X,-7) ) ,4) ) +transpose(((transpose(X,-7) +transpose((X|X) ,7) ) +(X|X) ) ,7) ) ,4) ) +transpose(transpose(transpose(transpose(step(X,12) ,-5) ,-7) ,4) ,7) ) ,-7) ) ,-5) +transpose((arpeggio(transpose(transpose((X|X) ,-5) ,-5) ) |(shuffle(transpose(transpose((((step(X,12) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose((transpose(arpeggio(X) ,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,4) ,-5) ) |transpose(step(((transpose(transpose(X,-5) ,4) +(X+transpose(X,12) ) ) |arpeggio(transpose(transpose(X,-5) ,-7) ) ) ,12) ,-7) ) ) ,7) ) ) ) ) ,4,6) ) ,4) ) +transpose(((((transpose(transpose(transpose(arpeggio(arpeggio(transpose(shuffle(step(((transpose(X,-5) +transpose((transpose(transpose((X+X) ,-7) ,-7) +transpose((transpose(shuffle(X) ,-7) +transpose(transpose(X,4) ,7) ) ,-5) ) ,4) ) +transpose((echo(echo(transpose(X,4) ,4,6) ,4,6) +transpose(transpose(X,-7) ,4) ) ,7) ) ,12) ) ,-5) ) ) ,-7) ,-5) ,4) +transpose((step(((arpeggio(((((shuffle(echo(shuffle(X) ,4,6) ) +transpose(transpose(transpose(transpose((X|transpose(X,4) ) ,4) ,4) ,-5) ,4) ) +transpose((((X+X) +X) |arpeggio((transpose(shuffle(X) ,-5) +transpose((X+transpose(X,7) ) ,7) ) ) ) ,7) ) +transpose((transpose(arpeggio((X|X) ) ,-5) +(((arpeggio(X) +transpose((X|X) ,12) ) +(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) |transpose(X,-7) ) ) +transpose(shuffle((transpose(X,4) +transpose(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,7) ) ) ,7) ) ) ,4) ) +transpose(arpeggio(echo(transpose(transpose((X+(X+X) ) ,-5) ,-5) ,4,6) ) ,7) ) ) +arpeggio(transpose(arpeggio(transpose(arpeggio(((X+X) +transpose(X,7) ) ) ,-5) ) ,4) ) ) +transpose(step(transpose(((transpose((transpose(transpose(X,-7) ,-7) +transpose(transpose(((transpose(X,-5) +transpose(shuffle(transpose(transpose(X,4) ,4) ) ,4) ) +transpose(transpose((X|X) ,-5) ,7) ) ,-7) ,12) ) ,-7) +transpose(shuffle(((transpose(X,4) +transpose(((X|X) +transpose(arpeggio(X) ,7) ) ,4) ) +transpose((((X|X) +transpose(transpose(step(X,12) ,-5) ,4) ) +transpose(echo(transpose(X,-5) ,4,6) ,7) ) ,7) ) ) ,-7) ) |transpose((transpose(transpose((transpose(X,4) |(X+transpose(X,7) ) ) ,-5) ,4) +transpose(((echo((arpeggio(X) +X) ,4,6) +transpose(shuffle(echo(transpose(X,4) ,4,6) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,12) ) ,-5) ) ,4) ,12) ,7) ) ,12) +arpeggio((transpose(transpose(((((((arpeggio(transpose(transpose(X,-7) ,4) ) +transpose(step(echo(shuffle(X) ,4,6) ,12) ,4) ) +transpose((X|(X+X) ) ,7) ) +(((transpose(X,4) +shuffle(X) ) +transpose(((X+X) |(X+transpose(X,7) ) ) ,7) ) +transpose(transpose(((transpose(X,-5) +transpose(transpose(X,4) ,4) ) +transpose(arpeggio(X) ,7) ) ,-7) ,7) ) ) +transpose(transpose(step(((transpose((X+transpose(X,12) ) ,4) +transpose((X+transpose(X,12) ) ,12) ) +transpose((step(step(X,12) ,12) +transpose((step(X,12) +transpose(X,7) ) ,12) ) ,7) ) ,12) ,-7) ,4) ) +transpose(echo((X+transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-7) ) ,4,6) ,7) ) +transpose((transpose(transpose(transpose(X,-7) ,-5) ,4) |((echo((X+transpose(X,12) ) ,4,6) +transpose((echo(X,4,6) +transpose(transpose(X,-5) ,12) ) ,4) ) +transpose(step((X+transpose(X,12) ) ,12) ,7) ) ) ,7) ) ,4) ,-7) |(((((transpose((X+transpose(X,12) ) ,4) +transpose((X+transpose(X,7) ) ,12) ) +transpose(arpeggio((transpose(X,-5) +X) ) ,12) ) +((step(transpose(X,4) ,12) +step(shuffle(transpose(transpose(X,4) ,-7) ) ,12) ) |transpose(((X+(X+X) ) +transpose(transpose((X+X) ,4) ,-7) ) ,-5) ) ) +transpose((transpose((transpose(transpose((X+transpose(X,7) ) ,4) ,-7) +((X+X) +transpose(transpose(echo((X+X) ,4,6) ,-5) ,12) ) ) ,4) |(shuffle((step(step(X,12) ,12) +transpose(((transpose(transpose(X,-7) ,-7) +transpose(arpeggio((X+transpose(X,12) ) ) ,4) ) +transpose(X,7) ) ,7) ) ) +(transpose(X,-5) +transpose(((X+X) |(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) |((transpose(X,-7) +transpose(transpose(X,4) ,4) ) +transpose(echo(X,4,6) ,7) ) ) |(transpose((X+transpose(X,12) ) ,4) |(transpose(X,-5) +transpose(transpose(X,4) ,12) ) ) ) ) ,12) ) ) ) ,4) ) +transpose(((arpeggio((transpose((((X+X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ,4) +transpose(((transpose(X,4) +transpose(transpose(X,-5) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) ,7) ) ,7) ) ) +transpose((transpose(transpose((arpeggio(transpose(echo(X,4,6) ,4) ) +transpose(((transpose(X,4) |X) |X) ,7) ) ,4) ,-7) +transpose(transpose(transpose(transpose(X,-7) ,-7) ,-5) ,4) ) ,7) ) +(transpose(transpose(X,4) ,4) +transpose((arpeggio(transpose((transpose(X,-5) +transpose(step(X,12) ,12) ) ,4) ) |transpose(((arpeggio((X+(X|X) ) ) +transpose((transpose(transpose(X,-5) ,-5) +step(echo(X,4,6) ,12) ) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ,-5) ) ,7) ) ) ,7) ) ) ) ) ,4) ) +transpose((echo(echo(arpeggio((transpose((X|(X+X) ) ,4) +transpose(transpose((transpose(((X+transpose(X,12) ) |echo(X,4,6) ) ,4) |((transpose(X,-7) |echo(X,4,6) ) +transpose(transpose((X+(X|X) ) ,-7) ,7) ) ) ,-7) ,7) ) ) ,4,6) ,4,6) +((transpose(transpose(transpose(echo((transpose((shuffle(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ) +step(((X+transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(X) ,7) ) ,12) ) ,4) +((transpose(X,4) |transpose((transpose(X,-7) |shuffle(X) ) ,4) ) |echo(transpose(transpose(X,-5) ,-5) ,4,6) ) ) ,4,6) ,-5) ,4) ,-5) +transpose(shuffle(shuffle((((((((transpose(shuffle(transpose(X,-7) ) ,4) +transpose(((transpose(arpeggio(X) ,4) +transpose(transpose(X,4) ,4) ) +transpose(((X+X) |transpose(transpose(X,4) ,-5) ) ,7) ) ,4) ) +transpose(transpose((transpose(X,4) |arpeggio(X) ) ,-5) ,7) ) +transpose(transpose(((shuffle(X) +transpose(transpose(X,-7) ,4) ) +transpose((X+(X+X) ) ,7) ) ,-7) ,4) ) +transpose(((arpeggio(X) +transpose(((shuffle(X) +transpose(transpose(X,-5) ,4) ) +transpose(echo(((X|X) |transpose(X,4) ) ,4,6) ,7) ) ,4) ) +transpose(transpose((transpose(transpose(transpose(X,-5) ,-7) ,-7) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,12) ) ) ,4) ,7) ) ,12) ) +transpose((((transpose((((transpose(X,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(X,12) ) ,4) +transpose((transpose(transpose(X,-5) ,-5) +transpose((transpose(X,-7) |X) ,7) ) ,12) ) |(step(transpose(X,-7) ,12) +transpose(((X+transpose(X,7) ) +transpose(step(X,12) ,12) ) ,12) ) ) +transpose(transpose((shuffle(shuffle(transpose(X,-7) ) ) |((transpose((X+transpose(X,7) ) ,-5) +transpose(transpose((X+X) ,-5) ,12) ) +(echo((X+transpose(X,7) ) ,4,6) +step(X,12) ) ) ) ,-7) ,7) ) ,4) ) +transpose(echo(((transpose(step(X,12) ,-7) +(transpose(X,-7) +transpose(X,-5) ) ) +transpose(transpose((echo(X,4,6) |X) ,-7) ,12) ) ,4,6) ,7) ) |shuffle(transpose((((X+transpose(X,12) ) |((echo(transpose(X,4) ,4,6) +transpose((X+X) ,12) ) |transpose(transpose(X,4) ,-5) ) ) +X) ,-5) ) ) ) ) ,4) ) +transpose(((((arpeggio(transpose(transpose(shuffle((((X+X) +X) +((X+transpose(transpose(X,-5) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ) ,-5) ,-5) ) +transpose(((echo((transpose(transpose(arpeggio(((X+X) |echo(X,4,6) ) ) ,-7) ,-7) +(step(((X+X) +(X+transpose(X,12) ) ) ,12) |shuffle((((X+transpose(X,4) ) +transpose(X,7) ) +X) ) ) ) ,4,6) +transpose(((transpose(arpeggio(((((((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose((X+X) ,7) ) +transpose(arpeggio((X+transpose(X,7) ) ) ,4) ) +transpose(transpose(transpose(transpose(X,-7) ,4) ,4) ,7) ) |transpose(((X+transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) ,-7) ) ) ,-5) +transpose(((transpose(transpose(((X+transpose(X,12) ) |step(X,12) ) ,4) ,-7) +transpose(X,-5) ) +transpose((X+transpose(X,7) ) ,-7) ) ,4) ) +transpose((transpose(X,-5) +transpose(shuffle((transpose(transpose(X,4) ,-5) +arpeggio((X+transpose(X,7) ) ) ) ) ,7) ) ,7) ) ,7) ) +transpose(step(echo(transpose(transpose(transpose(((transpose((transpose(X,-7) +X) ,-5) +transpose(echo(transpose(echo(X,4,6) ,-5) ,4,6) ,4) ) +transpose(transpose(echo(X,4,6) ,-7) ,7) ) ,-7) ,4) ,4) ,4,6) ,12) ,7) ) ,12) ) +transpose((((transpose((((transpose((X|arpeggio(X) ) ,-5) |((step(X,12) +transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(X,7) ) ,7) ) |(X+X) ) ) +(step((step(X,12) +(X+transpose(X,12) ) ) ,12) +transpose(transpose((X|X) ,4) ,7) ) ) +transpose(echo(((X|(X+(X+X) ) ) +((X|X) |shuffle(((X+X) |X) ) ) ) ,4,6) ,12) ) ,4) +transpose(shuffle(transpose(transpose((transpose(transpose(X,-5) ,-5) |echo(shuffle(X) ,4,6) ) ,4) ,4) ) ,4) ) +transpose(((echo((((transpose(step(X,12) ,4) +transpose((X+(X+transpose(transpose(X,4) ,12) ) ) ,4) ) +transpose(transpose(transpose(X,4) ,4) ,7) ) |(transpose(transpose(transpose(transpose(X,-5) ,4) ,4) ,-7) +((X|X) |transpose((X+transpose(X,7) ) ,-5) ) ) ) ,4,6) +transpose(transpose(transpose((X+transpose(echo(X,4,6) ,12) ) ,-7) ,-7) ,12) ) +transpose(((((transpose((arpeggio(transpose(X,4) ) +transpose((X|X) ,7) ) ,4) +transpose(((transpose(X,-7) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) ,4) ) +transpose(shuffle(echo(((X+transpose(X,7) ) +transpose((X+transpose(X,7) ) ,12) ) ,4,6) ) ,7) ) +transpose(shuffle(echo(((X|X) |X) ,4,6) ) ,4) ) +transpose((transpose(echo(X,4,6) ,-7) +transpose((echo(echo(X,4,6) ,4,6) +echo(transpose(transpose((X+transpose(X,12) ) ,4) ,4) ,4,6) ) ,12) ) ,7) ) ,12) ) ,7) ) +transpose(transpose(((transpose(transpose((X+transpose(X,12) ) ,-7) ,4) +transpose(((transpose(X,4) +transpose(transpose(X,4) ,12) ) +echo((X+transpose(X,12) ) ,4,6) ) ,7) ) +(transpose((step(X,12) +transpose((X+transpose(X,7) ) ,7) ) ,-7) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,-7) ,4) ) ,4) ) +transpose((transpose((shuffle(((transpose(X,-5) +X) +transpose(transpose(transpose((X+transpose(X,7) ) ,-5) ,-7) ,7) ) ) |transpose(echo(((((X|X) +X) +transpose(X,4) ) +transpose(((X+X) +X) ,7) ) ,4,6) ,-7) ) ,4) +transpose(transpose((transpose(step(((arpeggio(transpose((X+X) ,4) ) |((transpose(X,4) |echo(X,4,6) ) |(echo(X,4,6) +echo(X,4,6) ) ) ) +transpose(transpose(((transpose(X,-7) +transpose(shuffle(X) ,4) ) +transpose((X|X) ,7) ) ,4) ,7) ) ,12) ,4) +transpose(transpose(((transpose(X,-7) +transpose((X|X) ,4) ) +transpose((X|X) ,7) ) ,-5) ,7) ) ,-5) ,12) ) ,7) ) |(((((X|X) +transpose(X,7) ) +transpose(transpose((X|X) ,4) ,4) ) +transpose((((transpose(X,-5) +(X+X) ) +transpose(((shuffle(transpose(X,4) ) +transpose(transpose((X+X) ,-5) ,4) ) +transpose(((X+transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ,4) ) +transpose(transpose(echo((X+transpose(X,7) ) ,4,6) ,-7) ,7) ) ,7) ) +transpose((((transpose(X,-5) |transpose(X,-5) ) +transpose(arpeggio(echo(X,4,6) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,-5) ) ) ,7) ) ) ,7) ) +(step(((echo(((step(transpose(transpose(transpose(transpose((X+X) ,-5) ,4) ,4) ,-7) ,12) +transpose(step(echo(transpose(transpose((echo(X,4,6) +((X+(X+transpose(X,12) ) ) |transpose(X,-5) ) ) ,-5) ,-7) ,4,6) ,12) ,4) ) +transpose(transpose(arpeggio(transpose(((arpeggio((X+step(X,12) ) ) +transpose(((transpose(arpeggio(X) ,-7) +transpose((X+X) ,4) ) +transpose((arpeggio(X) |transpose(X,4) ) ,7) ) ,4) ) +transpose(((step(X,12) +transpose(transpose(X,4) ,12) ) +((X+X) |X) ) ,7) ) ,-7) ) ,-5) ,7) ) ,4,6) +transpose((transpose(arpeggio(transpose((step(X,12) +transpose((X+transpose(X,12) ) ,7) ) ,-7) ) ,-5) +transpose(transpose((transpose(X,-7) +transpose(transpose((X+X) ,-5) ,-5) ) ,-5) ,7) ) ,12) ) |step(((((transpose(((((X+transpose(X,7) ) +echo(transpose(X,4) ,4,6) ) +((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ) +transpose((transpose(X,-7) +X) ,7) ) ,-5) +(((transpose(((X+transpose(X,7) ) +transpose(X,7) ) ,-7) |(X+(transpose(X,-5) +transpose(transpose(X,-7) ,7) ) ) ) +transpose(arpeggio((transpose(shuffle(X) ,-5) +transpose((X+((X|X) +transpose(X,12) ) ) ,7) ) ) ,4) ) +transpose((transpose(X,-5) |((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) +shuffle(X) ) ) ,7) ) ) +(transpose(((X+X) |transpose(X,-7) ) ,4) +transpose((((X|X) |X) +transpose((X+transpose((X+X) ,7) ) ,7) ) ,7) ) ) +transpose((echo((echo((transpose((transpose(X,-7) +transpose(X,12) ) ,4) |(((X+transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) +(X+X) ) ) ,4,6) +transpose(X,7) ) ,4,6) +transpose(transpose(shuffle(transpose(X,-7) ) ,4) ,4) ) ,4) ) +transpose(((((transpose((X+X) ,-7) +transpose((shuffle(transpose(X,4) ) |transpose(X,4) ) ,7) ) +(transpose((step((X|X) ,12) +transpose(arpeggio(X) ,7) ) ,-7) +transpose(shuffle(step((X+transpose(X,7) ) ,12) ) ,7) ) ) +transpose((((((X+transpose((X+transpose(X,12) ) ,12) ) +(X+transpose((X+transpose(X,12) ) ,7) ) ) +transpose((transpose(X,-5) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ,4) ) +transpose((step(X,12) |(shuffle(X) +transpose(X,-7) ) ) ,7) ) +(step(step((transpose(X,-5) |(X+X) ) ,12) ,12) |step(((((X+X) +X) +transpose(transpose(echo((X|X) ,4,6) ,-7) ,4) ) +transpose(transpose(X,4) ,7) ) ,12) ) ) ,12) ) |transpose(echo(((X+transpose((echo(transpose(X,4) ,4,6) |(X|X) ) ,4) ) +transpose(arpeggio(transpose(transpose(X,4) ,-5) ) ,7) ) ,4,6) ,-7) ) ,7) ) ,12) ) ,12) |echo(((step(((echo((((transpose(((X+X) +transpose((X+transpose(X,12) ) ,7) ) ,4) +transpose((transpose((X+transpose(X,7) ) ,4) |step(transpose(X,4) ,12) ) ,12) ) +transpose(transpose(shuffle(((arpeggio(transpose((X|X) ,-5) ) +transpose(((X+X) |((X+X) |(X+transpose(X,12) ) ) ) ,4) ) +transpose((X|shuffle((X+transpose((X+transpose(X,7) ) ,7) ) ) ) ,7) ) ) ,-7) ,4) ) +transpose((transpose(transpose(X,-7) ,4) +transpose((transpose(transpose(echo(X,4,6) ,4) ,4) +transpose(echo(((X|X) |((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ) ,4,6) ,12) ) ,7) ) ,7) ) ,4,6) |((transpose(shuffle(transpose((X+transpose(X,12) ) ,-7) ) ,-7) +transpose(echo(arpeggio((shuffle(X) +((transpose(X,4) +X) |(X+X) ) ) ) ,4,6) ,12) ) |echo(shuffle(transpose(transpose(X,4) ,4) ) ,4,6) ) ) +arpeggio(((transpose(transpose(X,-5) ,-5) +transpose(echo(transpose(((((X|X) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose((((transpose(X,-7) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,4) ,7) ) +arpeggio((X|X) ) ) ,7) ) ,4) ,4,6) ,7) ) +((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +transpose((X+transpose((transpose(X,4) +transpose(transpose(transpose(X,-7) ,-7) ,12) ) ,12) ) ,4) ) +transpose((shuffle(step(transpose(X,-7) ,12) ) +transpose(((X+X) |X) ,7) ) ,7) ) ) ) ) ,12) +transpose(((((transpose((((transpose(transpose(X,4) ,-5) +(arpeggio(X) +transpose(arpeggio(X) ,12) ) ) +transpose(arpeggio((((transpose(X,4) +transpose((X|X) ,4) ) +transpose(shuffle(X) ,7) ) +transpose((X+X) ,7) ) ) ,4) ) +transpose(arpeggio(echo(transpose(X,-7) ,4,6) ) ,7) ) ,4) +transpose((transpose((transpose(X,4) +transpose((X|X) ,12) ) ,-7) +transpose(transpose(transpose(arpeggio(X) ,-5) ,-5) ,7) ) ,-5) ) |echo(transpose((echo((shuffle(X) +transpose(transpose(X,-5) ,12) ) ,4,6) +transpose(shuffle(transpose(X,4) ) ,-5) ) ,-5) ,4,6) ) +transpose(shuffle((transpose(echo((transpose(step(X,12) ,4) |step(X,12) ) ,4,6) ,4) |((transpose(((transpose(X,-5) +transpose(((X+transpose(X,4) ) +transpose((X|X) ,7) ) ,7) ) +shuffle(transpose(X,4) ) ) ,-7) +transpose(((arpeggio(transpose(transpose((X+shuffle(X) ) ,-7) ,-7) ) +transpose((((transpose(X,-7) |(X|X) ) +transpose((X|arpeggio(X) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) |((((transpose(X,4) +transpose(step(X,12) ,12) ) +transpose(transpose(X,4) ,-7) ) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(arpeggio(transpose(X,4) ) ,7) ) ) ,4) ) +transpose(((transpose(X,-7) +(transpose(step(X,12) ,-5) +transpose((X+transpose(transpose(X,-7) ,12) ) ,12) ) ) +transpose(transpose(shuffle(transpose(transpose(shuffle(X) ,-7) ,-7) ) ,-7) ,7) ) ,7) ) ) ) ,12) ) +transpose((arpeggio(transpose((transpose(step((step(X,12) +X) ,12) ,-5) +transpose((step(X,12) +((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) ) ,12) ) ,4) ) |echo(arpeggio(transpose(transpose(((arpeggio(((X+X) +transpose((X+X) ,7) ) ) +transpose(transpose(echo(X,4,6) ,-7) ,4) ) +transpose(step(step(X,12) ,12) ,7) ) ,-7) ,4) ) ,4,6) ) ,7) ) ,4) ) +transpose(transpose(((shuffle(transpose((step(((((X+transpose(X,12) ) +transpose((X|X) ,7) ) +transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose((step(X,12) |transpose(step(X,12) ,-7) ) ,7) ) ,12) |((((arpeggio(transpose(X,-7) ) +step((X+transpose(X,12) ) ,12) ) +(transpose(X,-5) +transpose(X,12) ) ) +transpose(step(transpose(arpeggio(X) ,4) ,12) ,7) ) |transpose(shuffle(transpose(transpose(X,4) ,-5) ) ,-7) ) ) ,-5) ) +transpose(((transpose((step((X+transpose(X,7) ) ,12) +transpose(step(echo(X,4,6) ,12) ,7) ) ,-5) +(echo((echo(X,4,6) +transpose(X,12) ) ,4,6) |(transpose(transpose(X,-5) ,4) +transpose(shuffle(X) ,-7) ) ) ) |(arpeggio((transpose((X+X) ,-5) +transpose(((X|X) +X) ,7) ) ) +transpose(transpose(step(X,12) ,-5) ,12) ) ) ,4) ) +transpose(((((((((echo((X+X) ,4,6) +transpose(step(transpose(X,-7) ,12) ,7) ) +transpose(shuffle(transpose((X+transpose(X,7) ) ,-5) ) ,4) ) +transpose((transpose(transpose(X,-5) ,-5) |transpose((X+transpose(X,12) ) ,4) ) ,7) ) +(X+((X+transpose(X,12) ) +transpose(transpose(X,-5) ,7) ) ) ) +transpose((((transpose(X,-5) +(step(X,12) |X) ) +transpose(((X+transpose(transpose(shuffle(X) ,4) ,4) ) +transpose(shuffle(X) ,7) ) ,7) ) +transpose(transpose(transpose(transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ,-7) ,-5) ,-5) ,7) ) ,12) ) +transpose(transpose(transpose(transpose((transpose(X,-5) +X) ,-5) ,-5) ,-5) ,4) ) +transpose((((((transpose(arpeggio(X) ,-5) +transpose((transpose(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose((X|X) ,7) ) ,-7) +transpose(transpose(X,-5) ,4) ) ,4) ) +transpose(shuffle((X+transpose(X,12) ) ) ,7) ) +transpose(((transpose(X,-5) +step((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) +arpeggio((X+transpose(X,12) ) ) ) ,4) ) +transpose(transpose((X+X) ,-7) ,7) ) |((transpose(((transpose(X,-7) +X) +transpose(X,4) ) ,-7) +transpose(transpose(arpeggio(X) ,-5) ,4) ) |((transpose(X,-5) +transpose(((X+transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) +transpose(((step((X+transpose(X,12) ) ,12) +transpose(transpose(X,4) ,12) ) +X) ,12) ) ) ) ,4) ) +transpose((transpose(arpeggio(transpose(transpose(arpeggio(step(X,12) ) ,4) ,4) ) ,-5) +transpose((echo(((shuffle(transpose(X,-5) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,12) ) +transpose(transpose((((X+transpose(X,12) ) |transpose(X,-7) ) +transpose(transpose(step(X,12) ,4) ,12) ) ,4) ,12) ) ,4,6) |transpose((((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +echo(transpose(X,-5) ,4,6) ) ,-7) +transpose(echo((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,-7) ) ,4,6) ,4) ) +transpose(((transpose(X,4) +arpeggio(X) ) |transpose((transpose(X,-5) +arpeggio(X) ) ,-7) ) ,7) ) +transpose(echo(((((X|X) +transpose(X,4) ) +transpose((X|X) ,7) ) |transpose((X|X) ,-7) ) ,4,6) ,7) ) ,-7) ) ,12) ) ,7) ) ,7) ) ,4) ,7) ) ,4,6) ) ) +(transpose(transpose(echo(transpose(transpose(((((((X+transpose(X,7) ) +transpose(transpose(X,4) ,-7) ) |arpeggio(transpose(X,4) ) ) |((((step(X,12) +transpose(step(X,12) ,4) ) +transpose(echo(X,4,6) ,7) ) +transpose(((X+X) |(X+transpose(X,12) ) ) ,12) ) |transpose((X|X) ,4) ) ) +transpose((X+transpose(((X+transpose(transpose(X,-7) ,7) ) +transpose((X|X) ,-7) ) ,7) ) ,12) ) |echo((echo(transpose(shuffle(X) ,-7) ,4,6) +transpose((transpose(X,4) +X) ,-5) ) ,4,6) ) ,-5) ,4) ,4,6) ,4) ,-7) +step(shuffle(((shuffle(echo(transpose((echo((((X|transpose(transpose(X,4) ,4) ) |transpose(step(X,12) ,-5) ) |transpose(echo((X+transpose(X,7) ) ,4,6) ,-5) ) ,4,6) |transpose((((shuffle(X) +transpose(X,-5) ) +transpose((X|X) ,4) ) +transpose(shuffle(arpeggio((X+transpose(X,7) ) ) ) ,7) ) ,-7) ) ,4) ,4,6) ) +transpose(transpose(echo(transpose(transpose(((transpose(transpose((X|X) ,4) ,-7) +transpose((transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,4) |step((transpose(X,-5) +transpose(transpose(X,-7) ,7) ) ,12) ) ,7) ) |shuffle((step(transpose(transpose(echo(X,4,6) ,-5) ,4) ,12) |transpose((transpose(X,-5) +transpose(shuffle(X) ,7) ) ,-7) ) ) ) ,-5) ,-5) ,4,6) ,-7) ,12) ) |(transpose(((shuffle(((transpose((transpose(X,-5) |X) ,4) +transpose(((X|X) |transpose(step(X,12) ,-7) ) ,7) ) +echo(X,4,6) ) ) +transpose(transpose(((transpose(X,-5) +transpose(X,12) ) +X) ,-7) ,4) ) +transpose(((transpose(echo(echo((X+X) ,4,6) ,4,6) ,-5) +transpose(transpose(transpose(arpeggio(X) ,-7) ,-5) ,12) ) +transpose(transpose(shuffle(X) ,-5) ,12) ) ,7) ) ,-7) |transpose(transpose(transpose(step(arpeggio(X) ,12) ,-7) ,-5) ,4) ) ) ) ,12) ) ) ,7) )
random seed used was 225503189

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