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:

echo(((step(arpeggio(transpose((((transpose(X,-5) +(step(X,12) +(X+transpose(X,12) ) ) ) +transpose(echo(((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ,4,6) ,4) ) +transpose(arpeggio(((step(X,12) +transpose((transpose(X,4) +transpose(transpose(X,4) ,7) ) ,4) ) +transpose(shuffle(X) ,7) ) ) ,7) ) ,-7) ) ,12) +transpose((((((transpose((step(arpeggio(X) ,12) +transpose(arpeggio(X) ,12) ) ,4) +transpose(arpeggio(((((X+transpose(step(step(X,12) ,12) ,4) ) +transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,7) ) +transpose(((X+transpose(echo(X,4,6) ,12) ) +transpose((X+transpose(X,12) ) ,12) ) ,4) ) +transpose((arpeggio(X) +transpose((X+X) ,12) ) ,7) ) ) ,4) ) +transpose((((step(arpeggio(X) ,12) +transpose(echo(((X+shuffle(X) ) +transpose(shuffle(X) ,12) ) ,4,6) ,4) ) +transpose(transpose((((X+transpose(X,7) ) +transpose((X+X) ,7) ) +transpose(transpose(X,-5) ,12) ) ,-7) ,7) ) +transpose(step(((step(transpose(X,4) ,12) +shuffle(transpose(echo(X,4,6) ,-7) ) ) +transpose((((((X|X) +(X+X) ) |transpose(X,-5) ) +transpose((X|X) ,4) ) +transpose(step(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,12) ,7) ) ,7) ) ,12) ,7) ) ,7) ) +echo(echo(((arpeggio((((step(X,12) +transpose(step(X,12) ,7) ) |X) |shuffle(X) ) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,4) ) +transpose(arpeggio((((transpose(step(X,12) ,4) +transpose(((transpose(X,-5) +transpose((X+transpose(X,12) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ) +transpose(X,7) ) +transpose((transpose(X,-5) +shuffle((X+transpose(X,12) ) ) ) ,12) ) ) ,7) ) ,4,6) ,4,6) ) +transpose(((((echo((((((((X+transpose(X,7) ) +transpose(transpose(X,4) ,7) ) +transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,7) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) +transpose(arpeggio(((transpose(X,-5) +transpose(arpeggio(transpose(X,4) ) ,7) ) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) ) ,7) ) +transpose((transpose(echo(transpose((shuffle(X) |X) ,4) ,4,6) ,-5) +(((shuffle(transpose(X,-7) ) +transpose(echo(X,4,6) ,12) ) +transpose(((X+transpose(X,7) ) +transpose((((X+transpose(X,7) ) +transpose((X|X) ,4) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(((step(X,12) +transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,4) ) +transpose(echo(step((echo(transpose((X+transpose(X,7) ) ,-5) ,4,6) +transpose(X,7) ) ,12) ,4,6) ,7) ) ,4,6) +transpose(echo((((echo((X+X) ,4,6) +((shuffle(((transpose(X,-5) |X) +transpose(transpose((X+transpose(X,7) ) ,-5) ,7) ) ) +transpose(step(arpeggio(echo(X,4,6) ) ,12) ,4) ) +transpose(((arpeggio(step(X,12) ) +transpose(shuffle((X|X) ) ,4) ) +transpose((((shuffle((X+transpose(X,7) ) ) +transpose(shuffle((X+transpose(X,7) ) ) ,4) ) +transpose((X+X) ,7) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ,7) ) ) +arpeggio(echo(((arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(transpose(X,-7) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ) ) |step(((echo(step((X+transpose(X,7) ) ,12) ,4,6) +transpose((echo(step(X,12) ,4,6) +transpose(X,7) ) ,4) ) +transpose((echo((step(X,12) +transpose(X,-5) ) ,4,6) +transpose(step((X+((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ,12) ) ,7) ) ,12) ) ,4,6) ,4) ) +transpose(step((echo((((transpose((transpose(X,-7) +X) ,-5) +arpeggio((X+transpose(X,12) ) ) ) +transpose(echo(shuffle(step((X+transpose(X,7) ) ,12) ) ,4,6) ,4) ) +transpose((arpeggio(arpeggio(X) ) +transpose(step(transpose((X+transpose((X+transpose(X,7) ) ,7) ) ,-7) ,12) ,7) ) ,7) ) ,4,6) +transpose(transpose(transpose((shuffle(echo(X,4,6) ) +transpose(echo(((((X+transpose(X,12) ) +transpose(shuffle(X) ,4) ) +transpose(X,7) ) +echo((X+transpose(X,-5) ) ,4,6) ) ,4,6) ,7) ) ,4) ,-7) ,7) ) ,12) ,7) ) +transpose(arpeggio(step((((shuffle(X) +transpose(((X+transpose((X+X) ,4) ) +transpose(X,7) ) ,4) ) +transpose(echo((X+transpose(X,7) ) ,4,6) ,7) ) +transpose((step(shuffle(X) ,12) |step(X,12) ) ,12) ) ,12) ) ,4) ) +transpose((step(shuffle(echo(transpose(transpose(step((shuffle(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) +transpose((echo(X,4,6) +transpose(transpose(X,-7) ,7) ) ,7) ) ,12) ,-5) ,-7) ,4,6) ) ,12) +transpose((arpeggio(step(shuffle((((X+X) |transpose(X,4) ) +transpose(((echo((X+transpose(X,7) ) ,4,6) +transpose((X|X) ,4) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,7) ) ,7) ) ) ,12) ) +(echo(transpose(((echo(X,4,6) +transpose((step(X,12) +transpose(step(X,12) ,12) ) ,12) ) +transpose(transpose((X+transpose(X,12) ) ,-5) ,7) ) ,-5) ,4,6) +(((((shuffle(X) +transpose(X,12) ) +transpose(transpose(step(X,12) ,-5) ,7) ) +transpose((transpose(((step(X,12) |X) +transpose(X,7) ) ,4) +(X+transpose(X,7) ) ) ,4) ) +transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(step(step(((X+((X+transpose(X,4) ) +transpose(X,7) ) ) +echo(X,4,6) ) ,12) ,12) ,12) ) ) ) ,7) ) ,7) ) ,12) ) +(arpeggio(((arpeggio((transpose(echo((echo(((((X|X) +transpose((X+X) ,7) ) +transpose(shuffle(X) ,7) ) +((X+transpose(X,12) ) +shuffle(X) ) ) ,4,6) +transpose(((X+transpose(arpeggio(X) ,12) ) |arpeggio(arpeggio(X) ) ) ,7) ) ,4,6) ,4) +transpose(shuffle(step(((transpose(X,-7) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) ,12) ) ) +transpose(step(arpeggio(((arpeggio(transpose(X,-7) ) +transpose((X|X) ,12) ) +transpose(transpose(step(transpose((shuffle(X) |X) ,-5) ,12) ,4) ,12) ) ) ,12) ,4) ) +transpose(((shuffle(((((X+transpose(X,12) ) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(arpeggio(X) ,7) ) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) ,7) ) +transpose((echo(arpeggio(shuffle(X) ) ,4,6) +echo(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,4,6) ) ,12) ) ) +transpose((((transpose(arpeggio(arpeggio(X) ) ,4) +transpose((shuffle((shuffle(((X+transpose(echo(X,4,6) ,4) ) +transpose(step(X,12) ,7) ) ) +transpose((echo(echo(X,4,6) ,4,6) +transpose((transpose((X+X) ,4) +transpose((X+X) ,7) ) ,7) ) ,12) ) ) +transpose(((echo(shuffle(step((X|X) ,12) ) ,4,6) +transpose((arpeggio(transpose(X,-7) ) +transpose(echo(arpeggio(X) ,4,6) ,12) ) ,4) ) +transpose(shuffle((echo(X,4,6) +transpose((transpose(X,-7) +transpose((X|X) ,12) ) ,12) ) ) ,7) ) ,4) ) ,4) ) +transpose((((((((step(X,12) +transpose(step(X,12) ,4) ) +transpose(((arpeggio(X) +transpose(step(X,12) ,4) ) +transpose(arpeggio(X) ,7) ) ,7) ) +transpose(arpeggio(shuffle(X) ) ,7) ) +transpose(transpose(echo(X,4,6) ,-7) ,4) ) +transpose(step(X,12) ,7) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ) +transpose((step(shuffle(step(arpeggio(X) ,12) ) ,12) |step(transpose(((X+transpose(step(X,12) ,4) ) +transpose(X,7) ) ,4) ,12) ) ,7) ) ,7) ) +transpose(((arpeggio((transpose(echo(X,4,6) ,-5) +transpose(arpeggio(echo(shuffle(X) ,4,6) ) ,12) ) ) +transpose(step(echo(((((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +(X+transpose(X,7) ) ) ,7) ) +transpose(step((X+transpose(arpeggio(X) ,12) ) ,12) ,4) ) +transpose(transpose(((X|X) +transpose(echo(X,4,6) ,12) ) ,-5) ,7) ) ,4,6) ,12) ,4) ) +transpose((shuffle(echo(transpose(X,-5) ,4,6) ) +transpose(((arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,7) ) ) +transpose(((X+transpose(X,4) ) +transpose(transpose((X|X) ,4) ,7) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ,7) ) ,7) ) ,7) ) +transpose(shuffle((arpeggio(transpose(((X+X) +(X+transpose(X,12) ) ) ,-7) ) +transpose((((X+transpose(X,12) ) +transpose(arpeggio((((X|X) +transpose(X,7) ) +transpose(echo(transpose((X+transpose(X,7) ) ,-7) ,4,6) ,12) ) ) ,4) ) +transpose((arpeggio((X|X) ) +transpose(arpeggio((X+transpose(X,12) ) ) ,7) ) ,7) ) ,-7) ) ) ,12) ) ,7) ) ) +(((echo(((arpeggio(((((X+transpose(echo(X,4,6) ,12) ) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) +transpose((echo(step(X,12) ,4,6) +transpose(arpeggio(transpose(echo(X,4,6) ,-7) ) ,12) ) ,12) ) ) +transpose(shuffle((transpose((transpose(transpose(X,-5) ,-7) +(echo(X,4,6) +transpose((X+transpose(X,12) ) ,12) ) ) ,4) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ) ,7) ) +transpose(((transpose((X+transpose(X,7) ) ,4) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |arpeggio(X) ) ,7) ) |(arpeggio(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,7) ) +(X|shuffle(X) ) ) ) +transpose((transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,-7) |((((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(shuffle(transpose(X,-5) ) ,7) ) ) ,7) ) ) ,12) ) ,4,6) +transpose((shuffle((transpose(arpeggio(arpeggio(X) ) ,4) +transpose(shuffle((step(transpose((X+X) ,4) ,12) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +X) |(X+transpose(X,7) ) ) +transpose((shuffle(echo(X,4,6) ) +transpose((X+transpose(X,7) ) ,12) ) ,12) ) ,7) ) ) ,12) ) ) +transpose((shuffle(((transpose(transpose(X,-7) ,-5) +transpose(transpose(step(transpose(X,4) ,12) ,-7) ,4) ) +transpose(((X+X) +transpose(shuffle(X) ,7) ) ,7) ) ) +transpose((shuffle(step(transpose(X,4) ,12) ) +transpose(step(transpose((X+transpose((X|X) ,12) ) ,-5) ,12) ,12) ) ,12) ) ,12) ) ,4) ) +transpose(echo(echo(arpeggio(transpose((((step(X,12) +transpose((step(X,12) +transpose(((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,4) ) +transpose(shuffle(X) ,7) ) |(X+transpose(X,12) ) ) ,-5) ) ,4,6) ,4,6) ,7) ) +((shuffle(((echo(((arpeggio(X) +transpose(step((X|X) ,12) ,4) ) +transpose(echo(X,4,6) ,7) ) ,4,6) +transpose((transpose(step(step(transpose((transpose(X,-5) |arpeggio(X) ) ,-5) ,12) ,12) ,4) +transpose((transpose(((step(echo(X,4,6) ,12) +transpose((step(X,12) |transpose((X+X) ,-5) ) ,4) ) +transpose(((X+transpose(X,7) ) +transpose(X,7) ) ,7) ) ,-7) +(arpeggio(echo(X,4,6) ) +transpose((((transpose(transpose(X,-5) ,-7) +transpose((X+X) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +((((X+transpose(X,4) ) +transpose(X,7) ) |echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) +echo(((X+transpose(X,7) ) |arpeggio(X) ) ,4,6) ) ) ,7) ) ) ,7) ) ,4) ) +transpose(echo(((((echo(arpeggio((X+transpose(X,12) ) ) ,4,6) +transpose(((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) |(arpeggio((X+transpose((X+transpose(X,7) ) ,7) ) ) +transpose(step(shuffle(X) ,12) ,12) ) ) +transpose(echo(transpose(X,-7) ,4,6) ,4) ) +transpose(shuffle(arpeggio(X) ) ,7) ) ,4,6) ,7) ) ) +transpose((echo(transpose(arpeggio(shuffle(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose((echo(X,4,6) +transpose(shuffle(X) ,7) ) ,4) ) +transpose(arpeggio(shuffle(step(X,12) ) ) ,7) ) ) ) ,4) ,4,6) +transpose(transpose(transpose((((arpeggio(X) +transpose(shuffle((transpose(X,4) +transpose(X,7) ) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(step(X,12) ,12) ) ,7) ) +transpose(step(step(transpose(shuffle(X) ,-7) ,12) ,12) ,7) ) ,-5) ,-7) ,7) ) ,4) ) +transpose((((((((arpeggio(step(((X+transpose(X,7) ) +X) ,12) ) +transpose(transpose(X,4) ,4) ) +transpose(((step(X,12) +transpose((X+transpose(X,7) ) ,12) ) +X) ,7) ) |echo(step(echo(arpeggio(X) ,4,6) ,12) ,4,6) ) |step((((step(X,12) +(X+transpose(X,12) ) ) +transpose(echo(step(transpose(X,4) ,12) ,4,6) ,4) ) +transpose(transpose((step(X,12) |transpose(X,-5) ) ,-5) ,7) ) ,12) ) +(echo((((shuffle(((X+transpose(X,7) ) +(((X+transpose(X,4) ) +transpose(X,7) ) |X) ) ) +transpose((((((X+transpose(X,7) ) +transpose(X,7) ) +transpose(arpeggio(X) ,12) ) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ) +transpose((((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose(X,7) ) ,7) ) +transpose(transpose(((X+transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) +(echo(X,4,6) |((X+transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ) ) ,4) ,12) ) ,4,6) +echo(echo(transpose(shuffle(echo((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ) ,-5) ,4,6) ,4,6) ) ) +transpose((arpeggio((X+transpose((X+X) ,7) ) ) |(transpose(((((X+transpose(X,12) ) +transpose((((X+transpose(X,12) ) +transpose(transpose(X,-5) ,4) ) +transpose(shuffle(X) ,7) ) ,12) ) +(shuffle(step((X+X) ,12) ) +transpose((transpose(step(X,12) ,-5) +transpose(X,12) ) ,12) ) ) +transpose(echo(echo(step(transpose(X,4) ,12) ,4,6) ,4,6) ,7) ) ,4) +transpose((transpose(transpose(X,4) ,4) +transpose(transpose((((echo(arpeggio(X) ,4,6) +(transpose(X,4) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(echo(X,4,6) ,12) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) +shuffle((X+transpose(X,7) ) ) ) +((step(X,12) +transpose((X+transpose(X,12) ) ,12) ) +transpose((transpose(X,-7) +transpose(step(X,12) ,7) ) ,7) ) ) ,12) ) ,4) ,12) ) ,12) ) ) ,4) ) +transpose(((step(echo((transpose(X,-5) +transpose((X+transpose(transpose(X,-5) ,7) ) ,12) ) ,4,6) ,12) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(((((((arpeggio(transpose((X+X) ,-7) ) |(shuffle(X) +(X+transpose(X,7) ) ) ) +transpose((transpose(X,-7) +transpose((((X+transpose(X,12) ) +transpose(((transpose(X,-7) +transpose((X+X) ,4) ) +transpose(X,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) ,7) ) ,4) ) +transpose(arpeggio(step(X,12) ) ,7) ) +transpose(((step(arpeggio(echo(((X+transpose(X,12) ) |echo(X,4,6) ) ,4,6) ) ,12) +transpose(shuffle((X+transpose(transpose(X,-7) ,12) ) ) ,4) ) +transpose((shuffle(shuffle(transpose(arpeggio(X) ,4) ) ) +transpose((X+transpose(step(X,12) ,12) ) ,7) ) ,7) ) ,4) ) +transpose(echo((shuffle(X) +transpose(transpose(X,4) ,7) ) ,4,6) ,7) ) +transpose(((step((step(X,12) +(((X+transpose(X,12) ) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ,12) +transpose(transpose(step((echo(X,4,6) |(X+X) ) ,12) ,4) ,12) ) |transpose((step(X,12) +transpose(X,12) ) ,-5) ) ,12) ) ,7) ) ,7) ) ,7) ) ) ) ) ,4) ) +transpose((((shuffle((((step((shuffle(X) +transpose(shuffle(X) ,12) ) ,12) +transpose(shuffle(shuffle(echo(X,4,6) ) ) ,4) ) +transpose((((((X+transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(arpeggio(step(transpose(X,4) ,12) ) ,4) ) +transpose(arpeggio(step((shuffle(X) +transpose(step(X,12) ,7) ) ,12) ) ,7) ) +transpose((((X+X) +transpose(arpeggio(echo((X+transpose(X,7) ) ,4,6) ) ,4) ) +transpose(((X+transpose(X,7) ) +transpose(((X|X) +transpose(X,7) ) ,12) ) ,7) ) ,7) ) ,7) ) +transpose(transpose(step((arpeggio(arpeggio((X|X) ) ) +transpose(((X+transpose(X,7) ) +shuffle((X+transpose(X,7) ) ) ) ,7) ) ,12) ,4) ,12) ) ) +transpose(transpose(shuffle(((((shuffle(X) +transpose(arpeggio(X) ,4) ) +transpose(transpose(((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) ,7) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((((X+transpose(X,7) ) +transpose(arpeggio(X) ,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,12) ) ,12) ) ,4) ) +transpose((X+transpose((arpeggio(X) +transpose((arpeggio(X) +transpose((X+transpose(X,12) ) ,12) ) ,7) ) ,12) ) ,7) ) ) ,-5) ,7) ) +transpose(echo((transpose(echo((((shuffle(((transpose(shuffle(step(((X+transpose(X,7) ) +transpose(transpose(X,4) ,12) ) ,12) ) ,4) +((transpose(X,-7) +X) |arpeggio(echo(X,4,6) ) ) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +((transpose(X,-5) +transpose(step(X,12) ,4) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) ) ) ) +transpose(echo((transpose(((transpose(echo(X,4,6) ,4) +transpose(transpose((((step(X,12) +transpose(X,4) ) +transpose(X,7) ) +transpose(echo((X+X) ,4,6) ,12) ) ,-7) ,12) ) +transpose(((shuffle(X) +transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ) +transpose((X+transpose(transpose(X,-5) ,7) ) ,7) ) ,7) ) ,4) |transpose(((X+transpose(X,7) ) |X) ,-5) ) ,4,6) ,12) ) +transpose((((transpose(((((step(X,12) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) ,7) ) +arpeggio(X) ) ,4) +(step((X+(X+X) ) ,12) +transpose((X+transpose(((X+transpose(X,12) ) +transpose((transpose(X,-5) +transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,12) ) ,7) ) ,12) ) ) +transpose(((transpose(((X+transpose((X+transpose(X,12) ) ,7) ) +transpose((arpeggio(step(X,12) ) +transpose(X,12) ) ,12) ) ,-5) +transpose(((step(X,12) +transpose(echo(transpose(X,4) ,4,6) ,12) ) +transpose(echo(echo(arpeggio(X) ,4,6) ,4,6) ,12) ) ,12) ) +step(echo(X,4,6) ,12) ) ,7) ) +transpose(transpose((((step(transpose((X+transpose(X,12) ) ,4) ,12) +(((X+transpose(X,12) ) +transpose((arpeggio(X) |(X|X) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) +transpose(transpose(transpose(echo(X,4,6) ,4) ,4) ,12) ) +transpose(arpeggio((X+transpose(echo(X,4,6) ,7) ) ) ,7) ) ,4) ,7) ) ,4) ) +transpose(step(shuffle(((((X+transpose(X,7) ) |X) +transpose(shuffle((X|X) ) ,7) ) |arpeggio((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ) ) ,12) ,7) ) ,4,6) ,4) +transpose((transpose(((((transpose(((transpose((X+transpose(X,7) ) ,4) |shuffle(X) ) +transpose(transpose(echo(X,4,6) ,-7) ,4) ) ,-5) +transpose((transpose(X,-7) +transpose((X+transpose(transpose(X,-7) ,12) ) ,12) ) ,4) ) +transpose(arpeggio((((transpose(echo(X,4,6) ,4) +transpose(transpose(transpose(X,-5) ,-7) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,12) ) ) ,7) ) +transpose(transpose(((transpose(X,-7) +(X|X) ) +transpose((X+transpose(X,12) ) ,7) ) ,-7) ,4) ) +transpose(transpose((transpose(((step(X,12) +transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(((transpose(X,-7) +transpose((X+transpose(X,7) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) ,-7) ,7) ) ,-5) |shuffle((shuffle(arpeggio((X|X) ) ) +transpose((X+transpose(transpose((X+transpose(X,7) ) ,-5) ,12) ) ,7) ) ) ) ,12) ) ,4,6) ,4) ) +transpose((arpeggio(transpose(echo((step(echo(((arpeggio((X|X) ) +transpose(step(shuffle(X) ,12) ,4) ) +transpose(step(X,12) ,7) ) ,4,6) ,12) +((X+transpose(X,7) ) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) ) ,4,6) ,4) ) +transpose(echo(shuffle(transpose(((transpose(shuffle(X) ,-5) |shuffle((X|X) ) ) +transpose(transpose(transpose((X+transpose(step(X,12) ,7) ) ,-7) ,-7) ,12) ) ,-5) ) ,4,6) ,7) ) ,7) ) ,7) ) ,4,6)
random seed used was 150761355

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