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 19 generations the expression "X" became this:
(((transpose(transpose((((((transpose(X,-5) +transpose(transpose(((arpeggio(X) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,12) ) +shuffle(X) ) ,-5) ,7) ) +transpose(transpose(shuffle((X|X) ) ,4) ,12) ) |(shuffle((X|X) ) |((X+step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ) |(shuffle(X) |transpose(X,-7) ) ) ) ) +transpose(((echo(transpose(((arpeggio(X) |X) +transpose((step(X,12) +transpose((arpeggio(X) +transpose(X,12) ) ,7) ) ,12) ) ,-7) ,4,6) +(transpose(echo(transpose(X,-7) ,4,6) ,4) +transpose(shuffle(((((arpeggio(transpose(X,4) ) |(shuffle(X) +transpose(transpose(X,-5) ,12) ) ) +shuffle((X+transpose(shuffle(X) ,12) ) ) ) +transpose(transpose(X,4) ,4) ) +transpose((((transpose(X,-7) +transpose(shuffle(X) ,7) ) |X) +transpose(transpose(X,-7) ,7) ) ,7) ) ) ,7) ) ) +transpose(transpose(step(shuffle((((transpose(X,-7) +transpose((arpeggio(X) |X) ,4) ) +transpose(shuffle(X) ,7) ) +transpose(X,4) ) ) ,12) ,-7) ,12) ) ,4) ) +transpose(transpose((arpeggio(transpose(transpose(transpose(((shuffle((X+transpose(X,7) ) ) |X) +transpose((shuffle((X+transpose(X,12) ) ) +transpose(shuffle((X+transpose(X,12) ) ) ,12) ) ,12) ) ,4) ,-5) ,-5) ) |(shuffle(transpose(transpose((shuffle((X+X) ) +transpose(X,-7) ) ,-7) ,-7) ) |transpose(X,-7) ) ) ,-5) ,7) ) ,4) ,4) +shuffle(((transpose(shuffle(transpose((shuffle(((transpose(X,-7) +shuffle(X) ) +transpose((X+shuffle(X) ) ,7) ) ) +transpose(((shuffle(transpose(X,-5) ) +transpose(((((X+X) +(X+X) ) +transpose(step(transpose(X,-5) ,12) ,4) ) +transpose(arpeggio(X) ,7) ) ,4) ) +transpose(((transpose((X+X) ,4) +transpose(step(arpeggio(X) ,12) ,12) ) |(shuffle(shuffle(X) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) ) ) ,7) ) ,-5) ) ,-7) ) ,4) +transpose(transpose(transpose(transpose(transpose(arpeggio(((transpose(step(X,12) ,-5) +transpose(shuffle(shuffle(X) ) ,4) ) +transpose((transpose(X,-5) +transpose(transpose(X,4) ,7) ) ,7) ) ) ,4) ,4) ,4) ,-7) ,4) ) +transpose(transpose(transpose(step(shuffle((shuffle(X) +echo(X,4,6) ) ) ,12) ,4) ,-5) ,7) ) ) ) +transpose((transpose(shuffle(shuffle((transpose(shuffle((transpose((((X|X) +transpose(transpose(X,4) ,4) ) +transpose((transpose(X,4) +(X|X) ) ,7) ) ,-5) +transpose(arpeggio((shuffle(X) +transpose(echo(X,4,6) ,12) ) ) ,7) ) ) ,-5) +transpose(step((step((X+transpose(X,7) ) ,12) +transpose((X|transpose(X,4) ) ,12) ) ,12) ,7) ) ) ) ,-7) +transpose((transpose((transpose(X,-5) +transpose((transpose(X,-5) +transpose(X,7) ) ,7) ) ,4) +transpose((arpeggio(X) +transpose(echo(transpose(shuffle(transpose(X,4) ) ,4) ,4,6) ,12) ) ,-7) ) ,7) ) ,-7) ) +transpose(arpeggio(transpose(arpeggio(transpose((((echo(transpose(X,-7) ,4,6) +(((transpose(shuffle(X) ,-7) +transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose(echo(((X+X) +shuffle(X) ) ,4,6) ,7) ) |shuffle((shuffle(X) +transpose(X,12) ) ) ) ) +transpose(transpose((transpose(step((X+transpose(X,12) ) ,12) ,4) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-5) ,12) ) ,-7) ,12) ) +transpose(shuffle(((transpose((transpose(X,4) +transpose((X|X) ,7) ) ,-5) +transpose(transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,4) ,12) ) |echo(arpeggio(transpose((X+transpose(X,7) ) ,-7) ) ,4,6) ) ) ,-7) ) ,-7) ) ,-5) ) ,7) )
random seed used was 1 EXPR = (echo(transpose(transpose((transpose(((echo(((transpose((X+X) ,-5) +(step(step(X,12) ,12) +(((X+transpose(X,12) ) +transpose((transpose(X,-5) +X) ,4) ) +transpose(X,7) ) ) ) |(transpose(((transpose((X+X) ,4) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) |((shuffle(transpose(X,-5) ) +transpose(((X+transpose(X,12) ) +transpose(step(X,12) ,12) ) ,4) ) +transpose(step((shuffle(X) +shuffle(X) ) ,12) ,7) ) ) ,-5) |((((echo(echo(X,4,6) ,4,6) +transpose(transpose(X,-7) ,4) ) +transpose(shuffle(X) ,7) ) +((echo(X,4,6) |(X+transpose(transpose(X,-5) ,12) ) ) |transpose(((X+X) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ) ) +(transpose(transpose(step(X,12) ,-7) ,4) |transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,7) ) ,-5) ) ) ) ) ,4,6) |shuffle(transpose((shuffle((X|transpose(X,-5) ) ) +shuffle(echo(transpose((X|X) ,4) ,4,6) ) ) ,-7) ) ) |(echo((transpose(arpeggio(shuffle(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ) ,4) +transpose(transpose(shuffle(transpose((X|X) ,-7) ) ,-5) ,7) ) ,4,6) |echo(((transpose(((((((X+X) +transpose(X,-7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X|transpose(X,-7) ) ,7) ) +transpose(((transpose(transpose(X,-7) ,4) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ,7) ) +transpose(echo(shuffle(step((X|X) ,12) ) ,4,6) ,12) ) ,-5) +transpose(shuffle((arpeggio(X) +transpose(echo(X,4,6) ,-7) ) ) ,4) ) +transpose(((echo(X,4,6) +arpeggio(X) ) +transpose(shuffle(((X+transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ) ,12) ) ,7) ) ,4,6) ) ) ,-5) +transpose(((transpose(shuffle(transpose(transpose(((step(X,12) +transpose(X,4) ) +transpose(echo((X+X) ,4,6) ,7) ) ,-5) ,-7) ) ,-7) +transpose(transpose(transpose((((X+transpose(X,7) ) |(X+transpose(X,7) ) ) |step(X,12) ) ,-5) ,-5) ,4) ) |(arpeggio(transpose(((transpose(transpose((transpose(X,4) +transpose(step(X,12) ,7) ) ,-7) ,-7) +transpose((shuffle(X) +(echo(X,4,6) +shuffle(((shuffle((X+transpose(X,12) ) ) +transpose(step((X|shuffle(X) ) ,12) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ) ) ,4) ) +transpose(arpeggio((step((transpose(X,-7) +transpose(X,12) ) ,12) +transpose(transpose((shuffle(step(X,12) ) +transpose(transpose(X,-5) ,7) ) ,-7) ,7) ) ) ,7) ) ,-7) ) +transpose(((((transpose((transpose((X|X) ,-5) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) |transpose(step(echo(transpose(transpose((X+transpose(X,7) ) ,4) ,-5) ,4,6) ,12) ,-7) ) +transpose(transpose(shuffle(transpose(((X+transpose(arpeggio(X) ,12) ) +transpose((X+transpose(transpose(X,-5) ,12) ) ,7) ) ,-5) ) ,4) ,4) ) +transpose(arpeggio(step(shuffle(((((transpose(X,4) +transpose(shuffle(X) ,7) ) +transpose((((X+transpose(X,7) ) +transpose(echo(X,4,6) ,4) ) +transpose(step(X,12) ,7) ) ,4) ) +transpose((transpose(X,4) |X) ,7) ) +shuffle(X) ) ) ,12) ) ,7) ) +echo(echo(arpeggio(((X|transpose(X,-7) ) +transpose(transpose(X,-5) ,-7) ) ) ,4,6) ,4,6) ) ,12) ) ) ,7) ) ,-5) ,-5) ,4,6) +(echo(transpose(step(echo(((((transpose(arpeggio(shuffle(shuffle((echo(transpose(X,-5) ,4,6) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) +transpose((X+X) ,7) ) ) ) ) ) ,-5) +(((X+transpose(X,12) ) |transpose(X,-5) ) +transpose((transpose(X,-7) +transpose((X+transpose(X,7) ) ,12) ) ,7) ) ) +transpose(shuffle((((step(step((X+transpose(X,7) ) ,12) ,12) +transpose(transpose(((echo((X+transpose(X,4) ) ,4,6) +transpose(shuffle(step(X,12) ) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ,-5) ,4) ) +transpose(echo(shuffle(transpose(arpeggio(X) ,4) ) ,4,6) ,7) ) +(transpose(((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(echo((transpose(X,-5) +transpose((X+X) ,12) ) ,4,6) ,4) ) +transpose(step(echo(X,4,6) ,12) ,7) ) ,-7) +transpose(transpose(transpose((((X|X) +transpose((X+X) ,7) ) |(X+(X+transpose(X,12) ) ) ) ,4) ,-5) ,4) ) ) ) ,4) ) +transpose(shuffle(((((X|(X+X) ) +shuffle(shuffle(X) ) ) +transpose((step((echo((X+X) ,4,6) +transpose(X,7) ) ,12) +transpose((((X+transpose(X,7) ) +transpose(arpeggio(echo(shuffle(X) ,4,6) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,7) ) ,12) ) |transpose((((((transpose(X,-7) +transpose(transpose(transpose(X,-7) ,4) ,7) ) +transpose(transpose((X|(X|X) ) ,-7) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) |((X+transpose(shuffle(X) ,7) ) +transpose(step(shuffle(X) ,12) ,12) ) ) |(echo(transpose(transpose(X,-7) ,-7) ,4,6) +transpose(shuffle(shuffle((X+transpose(X,12) ) ) ) ,12) ) ) ,-7) ) ) ,7) ) +transpose(shuffle(transpose(transpose(((transpose((echo(X,4,6) +transpose(X,7) ) ,4) +transpose(((transpose(shuffle((X+transpose(X,12) ) ) ,4) +transpose(shuffle(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,4) ) +transpose(transpose(((shuffle((X+transpose(X,7) ) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,-5) ,7) ) ,4) ) +transpose(transpose(transpose(transpose(shuffle(transpose(X,-5) ) ,-7) ,-7) ,-5) ,7) ) ,-7) ,-5) ) ,12) ) ,4,6) ,12) ,-5) ,4,6) +transpose(transpose((((((shuffle(step(shuffle(step((shuffle(((transpose(X,-5) +X) |(arpeggio(X) +X) ) ) +transpose(transpose(shuffle(step(X,12) ) ,-7) ,12) ) ,12) ) ,12) ) +transpose(step(((((((((X+transpose(X,12) ) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) +transpose(transpose(transpose(X,-7) ,-7) ,4) ) +transpose(transpose(transpose(transpose(shuffle(X) ,4) ,-5) ,-5) ,7) ) |((X+transpose(X,7) ) +transpose((X|(X|X) ) ,7) ) ) +arpeggio((((X+transpose(X,7) ) |X) +transpose(transpose((X+X) ,-5) ,12) ) ) ) ,12) ,7) ) +transpose(arpeggio(transpose((shuffle(echo(arpeggio(transpose(X,-5) ) ,4,6) ) |shuffle(transpose((((X+transpose(X,12) ) +transpose(step(X,12) ,12) ) +X) ,-7) ) ) ,-7) ) ,4) ) +transpose(shuffle((transpose(((shuffle(X) +transpose(X,7) ) |transpose(X,-7) ) ,4) +transpose((X|transpose(X,4) ) ,-7) ) ) ,7) ) +transpose((shuffle(transpose(arpeggio((X+transpose(X,12) ) ) ,-5) ) |(((((arpeggio(transpose(((shuffle(X) +transpose(X,12) ) +transpose(X,12) ) ,-5) ) +transpose(transpose((X+transpose(((X+transpose(X,12) ) +echo(X,4,6) ) ,12) ) ,-7) ,4) ) +transpose((transpose(transpose(X,4) ,-5) +transpose(shuffle(X) ,7) ) ,7) ) +transpose(shuffle(((shuffle(transpose(X,-5) ) |(X+X) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) ) ,-7) ) |echo(transpose(transpose(transpose(transpose(X,4) ,4) ,-7) ,-7) ,4,6) ) |((transpose((transpose(transpose(X,4) ,4) +transpose((transpose(transpose(X,-5) ,-7) |((X+transpose(X,12) ) |(X+X) ) ) ,4) ) ,-5) +transpose((shuffle(step(((X+X) +X) ,12) ) +(transpose(shuffle(X) ,-7) +echo((step(X,12) +transpose(arpeggio(X) ,12) ) ,4,6) ) ) ,-5) ) +(transpose(arpeggio(shuffle((transpose(transpose(X,4) ,-7) +transpose(shuffle((X+transpose(X,12) ) ) ,12) ) ) ) ,4) +transpose((transpose((transpose((X+X) ,4) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((((X+transpose(X,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(X,-7) ,7) ) ,4) ) +transpose(((X|X) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ) ,-5) +(transpose(transpose(X,-7) ,4) +(((X+transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(X,-5) ) ) ) ,12) ) ) ) ) ,4) ) +transpose(shuffle(echo((echo(((X+transpose(X,12) ) +transpose(X,-7) ) ,4,6) |(((X+transpose(X,7) ) +transpose(transpose(step((X+transpose(X,7) ) ,12) ,4) ,4) ) +transpose(((((X|X) +transpose(X,4) ) +transpose(X,7) ) |shuffle(X) ) ,7) ) ) ,4,6) ) ,7) ) ,-5) ,7) ) )
random seed used was 0

NOTE: Generated phrase was too large ( 7088 ) , it has been truncated at 5000 notes. EXPR = transpose((step(transpose((shuffle(transpose((shuffle(echo(arpeggio((transpose(X,4) +transpose(transpose(X,-7) ,12) ) ) ,4,6) ) |(((shuffle(transpose((X+transpose(X,12) ) ,-5) ) +transpose(transpose(transpose(shuffle(X) ,-7) ,-7) ,12) ) +transpose(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,7) ) ,-7) ,4) ) +transpose(transpose(transpose(transpose(transpose(X,4) ,-7) ,4) ,-5) ,7) ) ) ,4) ) +step(shuffle(echo(arpeggio(transpose(((shuffle(step(transpose(X,4) ,12) ) |transpose(echo(X,4,6) ,-5) ) +shuffle(((shuffle(X) +transpose(X,4) ) +transpose(X,7) ) ) ) ,4) ) ,4,6) ) ,12) ) ,-5) ,12) +(shuffle(shuffle(shuffle((transpose((transpose(((echo(((transpose(X,-5) +transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose((X|X) ,-7) ,7) ) ,4,6) +transpose(((shuffle((X+X) ) +transpose((step(transpose(X,-5) ,12) +transpose((X|X) ,4) ) ,4) ) +transpose((transpose(X,-5) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,4) ) +transpose(((((transpose(X,-5) +transpose(arpeggio(X) ,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(echo(arpeggio((transpose(X,4) +transpose(shuffle(X) ,7) ) ) ,4,6) ,12) ) ,7) ) ,4) |(echo(transpose(((echo(X,4,6) |step(X,12) ) +transpose((X+(X|X) ) ,12) ) ,4) ,4,6) +echo((shuffle(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) |step(transpose(X,-7) ,12) ) ,4,6) ) ) ,-5) +transpose(((((transpose(X,-5) |transpose((shuffle((((X+transpose(X,4) ) +transpose(X,7) ) +X) ) +transpose(step((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(transpose(X,4) ,4,6) ,7) ) ,12) ,12) ) ,-5) ) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(transpose(X,4) ,-5) ,7) ) +transpose(shuffle(transpose((((X+transpose(X,12) ) |X) +((X|X) +transpose(X,4) ) ) ,-7) ) ,12) ) ,12) ) ) ) ) |arpeggio(((echo(transpose(arpeggio(arpeggio(X) ) ,4) ,4,6) +transpose(shuffle(((transpose((arpeggio(((transpose(X,-7) +transpose((X+transpose((X|X) ,7) ) ,4) ) +transpose(X,7) ) ) +step(transpose(X,-5) ,12) ) ,-5) +transpose(arpeggio((echo(shuffle((shuffle(X) |X) ) ,4,6) +(((X+(transpose(X,-5) +transpose(arpeggio(transpose(X,4) ) ,7) ) ) +((((transpose((X+X) ,-5) +transpose((transpose(X,-7) +transpose(X,12) ) ,4) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) +transpose(shuffle(transpose((X|X) ,-7) ) ,4) ) +transpose(transpose((echo(X,4,6) +transpose(X,-7) ) ,-7) ,7) ) ) +(((X+transpose(step(X,12) ,4) ) +transpose(transpose(X,-5) ,7) ) |((X+(X+transpose(transpose(X,-7) ,12) ) ) +transpose(transpose(X,4) ,12) ) ) ) ) ) ,4) ) +transpose(echo(((X+transpose(X,12) ) +transpose(((X+X) +X) ,7) ) ,4,6) ,7) ) ) ,12) ) |transpose((step(((((X+X) +transpose(shuffle(transpose(X,-5) ) ,7) ) +shuffle(echo(((X+transpose(X,12) ) +transpose(((transpose(X,4) +transpose(arpeggio(X) ,4) ) +transpose(arpeggio(X) ,7) ) ,12) ) ,4,6) ) ) +arpeggio((transpose(X,4) |X) ) ) ,12) +shuffle(arpeggio(transpose(((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,-5) ) ) ) ,4) ) ) ) ) ,-5)
random seed used was 0 EXPR = ((echo(arpeggio(transpose((transpose((((transpose((shuffle(X) +transpose(X,4) ) ,4) +transpose((((((X+(shuffle(X) |transpose(X,-7) ) ) +transpose(((((X+transpose(X,7) ) +(X+transpose(X,7) ) ) +transpose((X+transpose(X,7) ) ,12) ) |(X+transpose(X,7) ) ) ,4) ) +transpose(transpose((shuffle(X) +transpose(shuffle(X) ,4) ) ,-5) ,7) ) +transpose(step(arpeggio(arpeggio(transpose(X,-7) ) ) ,12) ,4) ) +transpose(transpose(X,-7) ,7) ) ,4) ) +transpose(transpose(((X+transpose(X,12) ) +transpose(echo(transpose(X,4) ,4,6) ,12) ) ,4) ,7) ) +step(arpeggio(((echo(X,4,6) +(X|X) ) +step(step(X,12) ,12) ) ) ,12) ) ,-5) +transpose(transpose(transpose(transpose((shuffle(X) +X) ,-5) ,-5) ,4) ,7) ) ,4) ) ,4,6) +transpose((((((transpose(transpose((step(transpose(X,-7) ,12) |(X+(X+step(X,12) ) ) ) ,-7) ,4) +transpose((((shuffle(transpose(X,-5) ) +transpose(step(shuffle((X|(X+X) ) ) ,12) ,4) ) +transpose(echo(transpose((echo(X,4,6) +transpose(X,-5) ) ,-7) ,4,6) ,7) ) +transpose(transpose(X,-5) ,-7) ) ,12) ) +transpose(shuffle(((((((X+X) +transpose(((X+transpose(X,12) ) +transpose(shuffle(X) ,12) ) ,4) ) +transpose(transpose(transpose(X,-5) ,-5) ,7) ) +transpose(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) +(X+X) ) ,4) ,7) ) +transpose(step(step(((X+transpose(X,7) ) |shuffle(X) ) ,12) ,12) ,12) ) |transpose((echo(transpose(echo(X,4,6) ,-7) ,4,6) +transpose(transpose(((transpose(arpeggio(X) ,4) +transpose((X|X) ,4) ) +transpose(transpose((X|X) ,-7) ,7) ) ,4) ,7) ) ,-5) ) ) ,7) ) |arpeggio(transpose(transpose((transpose(transpose(transpose(transpose(X,4) ,-7) ,-5) ,-7) |shuffle((X|(X+X) ) ) ) ,-7) ,-5) ) ) +transpose(echo(echo(step(shuffle(transpose(((echo(((step((X+X) ,12) +((X+transpose(transpose(X,-5) ,4) ) +transpose(step(X,12) ,7) ) ) +transpose((X+transpose(X,7) ) ,4) ) ,4,6) +transpose(((arpeggio(X) +transpose((X|X) ,4) ) +transpose(X,4) ) ,4) ) +transpose(shuffle(step(arpeggio(transpose(step(transpose(X,-5) ,12) ,4) ) ,12) ) ,7) ) ,-5) ) ,12) ,4,6) ,4,6) ,12) ) |arpeggio(step(shuffle(((step(transpose(arpeggio(transpose(step(echo(step(transpose(transpose(X,4) ,-5) ,12) ,4,6) ,12) ,-5) ) ,4) ,12) +transpose((transpose(transpose(transpose(transpose(X,-7) ,4) ,4) ,-5) +((transpose((X+transpose(shuffle((X|X) ) ,7) ) ,-7) +transpose(((transpose(transpose(((X+transpose(X,12) ) +X) ,4) ,-5) +transpose(shuffle((transpose((X|X) ,-5) |X) ) ,4) ) +transpose((step((arpeggio((X+X) ) +transpose((X+X) ,-7) ) ,12) +transpose(transpose(step(transpose(X,-5) ,12) ,4) ,7) ) ,7) ) ,12) ) +transpose(shuffle((X+X) ) ,12) ) ) ,7) ) |step(transpose((shuffle(((((X+transpose(X,7) ) |X) +arpeggio(transpose(X,-7) ) ) +transpose(shuffle(step(X,12) ) ,-5) ) ) |echo(transpose((X+transpose(X,12) ) ,4) ,4,6) ) ,-5) ,12) ) ) ,12) ) ) ,4) ) +transpose(transpose(transpose(shuffle((echo((echo(shuffle(shuffle(arpeggio(transpose(transpose((X|X) ,-5) ,-7) ) ) ) ,4,6) +shuffle((((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) +step((X|X) ,12) ) |(transpose(X,4) |X) ) +transpose(X,7) ) ) ) ,4,6) +transpose(((step(((echo(transpose(((X+X) +transpose(transpose(X,-5) ,7) ) ,-7) ,4,6) +transpose((arpeggio(X) +(shuffle(X) |((X+transpose(X,7) ) +X) ) ) ,12) ) +(transpose(transpose(X,-7) ,-5) +(X+transpose((X+(X+transpose(X,12) ) ) ,7) ) ) ) ,12) +transpose((X|shuffle((((step(transpose((X+echo(X,4,6) ) ,-7) ,12) |transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +X) +X) ,-7) ) +transpose((((X+transpose(X,12) ) +transpose((shuffle(X) +transpose(X,12) ) ,7) ) +X) ,4) ) +transpose((echo((((X+transpose((X+X) ,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,7) ) +X) ,12) ) ,4,6) +((step(X,12) +transpose((X+transpose(transpose(X,-5) ,12) ) ,12) ) +shuffle(transpose(X,4) ) ) ) ,7) ) ) ) ,4) ) +transpose(transpose(transpose(((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|X) ,12) ) ,4) |(transpose(transpose(X,-7) ,4) +transpose(transpose((shuffle(X) |(X+transpose(X,12) ) ) ,4) ,7) ) ) +transpose((shuffle((transpose((X+transpose(X,12) ) ,4) +transpose((shuffle(X) |shuffle(X) ) ,7) ) ) +transpose(transpose(shuffle(X) ,4) ,12) ) ,12) ) ,-5) ,-7) ,7) ) ,12) ) ) ,-5) ,4) ,7) )
random seed used was 0


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