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:
Seed:
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Generations:
Phrase for X:
# of Tracks:
Randomize patches:
 

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After 17 generations the expression "X" became this:
((((step(echo(((arpeggio((X+transpose(X,12) ) ) +transpose(echo(((transpose(X,-7) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4,6) ,12) ) +transpose(step(transpose((((transpose(X,-7) |((transpose(X,4) |X) |transpose(transpose(X,-7) ,-7) ) ) +transpose((arpeggio((X+transpose(X,7) ) ) +transpose(arpeggio(transpose(X,-7) ) ,7) ) ,4) ) +transpose((X+echo(X,4,6) ) ,7) ) ,-7) ,12) ,12) ) ,4,6) ,12) +transpose(echo(step((echo(step(transpose(X,4) ,12) ,4,6) |transpose(shuffle((X+X) ) ,-5) ) ,12) ,4,6) ,12) ) +transpose((shuffle(transpose(echo(arpeggio((((transpose(step(X,12) ,-5) |step(X,12) ) +transpose((X+transpose(arpeggio(X) ,12) ) ,4) ) +transpose(arpeggio(X) ,7) ) ) ,4,6) ,-5) ) +transpose((((X|(((X|X) +transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,12) ) +transpose(arpeggio((X+transpose(X,12) ) ) ,12) ) ) +transpose(transpose(echo(((transpose(arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,7) ) ) ,-7) +transpose(echo(X,4,6) ,4) ) +transpose((transpose(transpose(X,-7) ,-7) +transpose((echo(X,4,6) +transpose((X+X) ,12) ) ,7) ) ,7) ) ,4,6) ,4) ,4) ) +transpose(step((transpose(transpose(((X+transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ,-7) |transpose((X+transpose(X,7) ) ,4) ) ,12) ,7) ) ,7) ) ,7) ) +transpose((transpose((echo(shuffle((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose((arpeggio(transpose(X,-7) ) +echo(step(transpose(X,-5) ,12) ,4,6) ) ,7) ) ) ,4,6) +transpose((transpose(((((transpose(transpose(X,-7) ,-7) |(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) ) +transpose(step(transpose(step(X,12) ,-7) ,12) ,12) ) +transpose(transpose(echo(shuffle(arpeggio(transpose(X,4) ) ) ,4,6) ,-5) ,4) ) +transpose(arpeggio(transpose(transpose(echo(X,4,6) ,4) ,-7) ) ,7) ) ,4) +transpose(echo(transpose(transpose(((transpose((X+transpose(((echo(X,4,6) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,-5) +transpose((((step(X,12) +transpose(X,4) ) +transpose(step(X,12) ,7) ) +transpose(((transpose(X,-7) +transpose((echo(X,4,6) +transpose((X|X) ,7) ) ,4) ) +transpose((transpose(X,-7) |(X+X) ) ,7) ) ,7) ) ,7) ) +transpose(arpeggio((transpose((X+transpose(X,12) ) ,-7) |((((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(echo(X,4,6) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ) ,7) ) ,-5) ,4) ,4,6) ,7) ) ,12) ) ,4) +transpose(shuffle(((step((((((((arpeggio(transpose(X,-7) ) +transpose((X|shuffle(X) ) ,4) ) +transpose(step(transpose(X,-7) ,12) ,7) ) +X) +transpose(shuffle(step(transpose(X,4) ,12) ) ,12) ) |echo((transpose(X,-5) +transpose(((X+transpose(X,12) ) +transpose(X,12) ) ,12) ) ,4,6) ) +transpose(transpose(((((arpeggio(X) |X) +transpose(shuffle(X) ,7) ) +transpose(transpose(transpose(arpeggio(X) ,4) ,-5) ,7) ) +transpose(step(transpose(X,4) ,12) ,7) ) ,4) ,4) ) +transpose((transpose(transpose(echo(arpeggio(X) ,4,6) ,-5) ,4) +transpose(arpeggio(transpose(echo(step(transpose(X,-7) ,12) ,4,6) ,4) ) ,12) ) ,7) ) ,12) +transpose(transpose(shuffle((echo(arpeggio(transpose(X,-7) ) ,4,6) +transpose(transpose(transpose(transpose((transpose(X,4) +transpose(transpose(X,-7) ,7) ) ,-7) ,4) ,-7) ,12) ) ) ,-7) ,12) ) |transpose((echo((transpose(((transpose(X,4) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) +transpose((((echo(X,4,6) +transpose(echo(shuffle(X) ,4,6) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose(step(X,12) ,12) ) ,12) ) ,4,6) +transpose(step((((transpose((X+(X+transpose(X,12) ) ) ,-5) |arpeggio(arpeggio(X) ) ) +transpose(arpeggio(X) ,7) ) +transpose(shuffle(((transpose(shuffle(X) ,-7) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) ,7) ) ,12) ,7) ) ,-7) ) ) ,12) ) ,4) ) +transpose(shuffle((((transpose((step(shuffle(((((echo(X,4,6) +transpose((X+transpose(X,12) ) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose((X+shuffle(X) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ) ,12) +transpose((((shuffle((echo((shuffle(X) +X) ,4,6) +transpose(((transpose(X,-5) +transpose(arpeggio((X+transpose(X,12) ) ) ,4) ) +transpose(transpose(arpeggio(X) ,-7) ,7) ) ,12) ) ) +transpose(transpose(((X|X) +transpose((step(X,12) +transpose(transpose(X,-7) ,12) ) ,12) ) ,-7) ,4) ) +transpose(step(echo((transpose(X,-7) +transpose(step(X,12) ,-5) ) ,4,6) ,12) ,7) ) +((shuffle((transpose((X+X) ,-7) +transpose((transpose(X,-7) +(X+transpose(X,7) ) ) ,12) ) ) +transpose(arpeggio(X) ,7) ) +echo(((step(X,12) +transpose(((X+transpose(X,12) ) +step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ) +transpose(transpose((X+transpose(X,12) ) ,4) ,7) ) ,4,6) ) ) ,7) ) ,-7) +transpose((transpose((shuffle(shuffle((transpose(X,4) +((X+transpose(X,7) ) +transpose(X,12) ) ) ) ) |(echo(((step((((transpose(X,4) |(X+transpose(X,7) ) ) +transpose(X,4) ) +transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,12) +transpose(shuffle((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,12) ) +transpose(((((((X|X) +transpose(X,12) ) +transpose(X,7) ) +transpose(transpose((X|X) ,-5) ,-5) ) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,-5) ,4) ) +transpose(step(transpose(X,4) ,12) ,7) ) ,12) ) ,4,6) +transpose(transpose(echo((arpeggio(X) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(step(X,12) ,12) ) +transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,12) ) ) ,4,6) ,-7) ,12) ) ) ,-7) +transpose((((step(transpose(echo(X,4,6) ,-7) ,12) +transpose(transpose(((transpose((arpeggio(X) +transpose(X,12) ) ,-5) +transpose(transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ,4) ) +transpose(transpose((echo(X,4,6) +transpose(((arpeggio(X) +transpose(step(X,12) ,4) ) +transpose((X+X) ,7) ) ,12) ) ,-7) ,7) ) ,-7) ,4) ) +transpose(step((transpose(echo(X,4,6) ,4) +transpose((((transpose(step(X,12) ,-5) +transpose(X,12) ) +transpose(((X+transpose(transpose(X,-7) ,12) ) +transpose((transpose(X,-5) +transpose(X,12) ) ,12) ) ,4) ) +transpose(step((step(X,12) +transpose((X+transpose(X,7) ) ,7) ) ,12) ,7) ) ,12) ) ,12) ,7) ) |(((step(shuffle(X) ,12) +transpose(((X+step(X,12) ) +transpose(step(X,12) ,7) ) ,4) ) +transpose(step(arpeggio((X+X) ) ,12) ,7) ) +transpose((X+transpose(X,7) ) ,-7) ) ) ,12) ) ,4) ) +transpose((transpose(echo((echo(X,4,6) +transpose(X,-5) ) ,4,6) ,-7) +transpose(((step(echo(step((X+transpose(X,7) ) ,12) ,4,6) ,12) +transpose(((X+transpose(X,12) ) +transpose(echo(X,4,6) ,7) ) ,7) ) +transpose((arpeggio(transpose(X,-7) ) |(((echo(X,4,6) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) ) ) ,7) ) ,7) ) ,7) ) |(((((arpeggio(((echo(echo(transpose(X,-5) ,4,6) ,4,6) +transpose(shuffle(echo(arpeggio(X) ,4,6) ) ,12) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ) +transpose((echo(echo((arpeggio(X) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,-7) ) ,7) ) ,4,6) ,4,6) +transpose(transpose(echo(step((X+transpose(X,12) ) ,12) ,4,6) ,-5) ,12) ) ,4) ) +transpose(((step(((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) +transpose((X+X) ,4) ) +transpose(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) ,7) ) ,12) +transpose((transpose(echo((shuffle(X) +X) ,4,6) ,-5) +transpose((((transpose(echo(transpose(X,-5) ,4,6) ,-7) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(arpeggio(X) ,12) ) ,4) ) +transpose(shuffle(transpose(X,-7) ) ,7) ) |(shuffle(X) +transpose(arpeggio(X) ,7) ) ) ,7) ) ,4) ) +transpose((X+transpose(transpose(X,4) ,12) ) ,7) ) ,7) ) +transpose((transpose(step(arpeggio((X+transpose(arpeggio(X) ,7) ) ) ,12) ,-7) +transpose((transpose(((((X+transpose(X,7) ) +transpose((X+X) ,7) ) +transpose((echo(step(X,12) ,4,6) +transpose(X,7) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,-5) ,7) ) ,-7) +transpose(transpose(shuffle(transpose(X,-7) ) ,-7) ,7) ) ,12) ) ,-7) ) +transpose(((transpose((transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,-7) +transpose(arpeggio(transpose(arpeggio((X+transpose(X,-7) ) ) ,4) ) ,12) ) ,4) +transpose(shuffle(arpeggio(transpose(((transpose(X,-5) +transpose((X+transpose(X,7) ) ,7) ) +transpose((transpose(X,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,-7) ) ) ,12) ) +transpose(((transpose(transpose(transpose((X+transpose(X,-7) ) ,-7) ,4) ,4) +transpose(transpose((step(transpose((((X|X) +transpose(X,4) ) +transpose(X,7) ) ,-7) ,12) +transpose(((transpose(transpose(transpose(X,-7) ,4) ,-7) +transpose(shuffle((X+transpose(X,7) ) ) ,12) ) +transpose((((echo(X,4,6) |X) +transpose((X+transpose(X,12) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) ,12) ) ,-7) ,4) ) +transpose(step(step(transpose((X+transpose(X,12) ) ,-5) ,12) ,12) ,7) ) ,7) ) ,4) ) +transpose((((shuffle(((((X+transpose(X,12) ) +transpose(X,12) ) +transpose(arpeggio(shuffle(X) ) ,4) ) +transpose(((X+transpose(X,12) ) +shuffle(X) ) ,7) ) ) +transpose(arpeggio(transpose(X,-7) ) ,12) ) +transpose(echo(transpose(step(step(echo(X,4,6) ,12) ,12) ,4) ,4,6) ,7) ) +transpose((arpeggio((((echo(((transpose(transpose((X+transpose(X,7) ) ,-7) ,-7) +transpose(((X+transpose(transpose(X,-5) ,12) ) +transpose(X,12) ) ,4) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,7) ) ,4,6) |(echo(X,4,6) |arpeggio(shuffle(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ) ) ) +transpose(((transpose(X,-5) |(((X+transpose(echo(X,4,6) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |((step(X,12) +transpose((X+X) ,4) ) +transpose(echo(X,4,6) ,7) ) ) ) |echo((shuffle((X+transpose(X,7) ) ) +transpose((((X+transpose(X,12) ) +transpose(X,12) ) +transpose(transpose(X,-7) ,12) ) ,7) ) ,4,6) ) ,4) ) +transpose(echo(((((echo(X,4,6) +transpose((X+transpose(X,7) ) ,12) ) +transpose(((X+X) +transpose(shuffle(X) ,12) ) ,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,4) ) +transpose(arpeggio(((X+transpose(X,-7) ) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ) ) ,7) ) ,4,6) ,7) ) ) |(transpose(step(step(transpose(arpeggio(X) ,-7) ,12) ,12) ,-7) +transpose((echo((echo(echo(X,4,6) ,4,6) +transpose(arpeggio(X) ,7) ) ,4,6) |((arpeggio((X+transpose(X,12) ) ) +transpose(((transpose(X,-7) +transpose(transpose(transpose(X,-7) ,-7) ,12) ) +transpose(X,7) ) ,7) ) +transpose((transpose(echo(X,4,6) ,-7) +transpose(step((step(X,12) +transpose(transpose(transpose(X,-5) ,4) ,7) ) ,12) ,7) ) ,12) ) ) ,12) ) ) ,12) ) ,7) ) ) ) ,7) )
random seed used was 996633

NOTE: Generated phrase was too large ( 7116 ) , it has been truncated at 5000 notes. EXPR = (((echo(echo(step((transpose(((((X+transpose(transpose(X,-5) ,4) ) +transpose(transpose(arpeggio(X) ,4) ,7) ) +transpose((((shuffle(transpose(X,-7) ) +transpose((arpeggio(X) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(((X+X) +arpeggio(X) ) ,7) ) |(arpeggio(X) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +X) ,7) ) ) ,7) ) +transpose(step((echo(arpeggio(echo(X,4,6) ) ,4,6) +transpose(transpose((((X|X) +transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ) ,12) ,7) ) ,-7) +transpose(((transpose(echo(transpose(shuffle(X) ,-5) ,4,6) ,-7) +transpose(transpose((((echo(X,4,6) +transpose(transpose(X,-7) ,12) ) +transpose(transpose(transpose(X,-7) ,-7) ,4) ) +transpose(echo(X,4,6) ,7) ) ,-7) ,7) ) +transpose(((((X+transpose(shuffle(X) ,4) ) +transpose(X,7) ) +X) +transpose(arpeggio((((X+transpose(X,12) ) +transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ,12) ) ,7) ) ,7) ) ,12) ,4,6) ,4,6) +transpose(transpose(((arpeggio(transpose((((X+transpose(step(X,12) ,7) ) +transpose(((transpose(transpose((X+transpose(((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) ,-7) ,-7) +transpose((shuffle(X) +transpose(transpose((arpeggio(X) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ,7) ) ,4) ) +transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +shuffle(step(X,12) ) ) ,7) ) ,7) ) +transpose(transpose((shuffle(transpose(X,-7) ) +transpose((((X+transpose(X,12) ) +transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,12) ) +transpose((X+(X+X) ) ,7) ) ,12) ) ,-7) ,7) ) ,4) ) |(transpose((arpeggio(transpose((X+X) ,-5) ) +transpose(step(transpose(echo(X,4,6) ,4) ,12) ,12) ) ,-7) +((transpose(echo(X,4,6) ,4) +transpose((echo((echo((X+transpose(X,7) ) ,4,6) +transpose(transpose(shuffle(X) ,4) ,12) ) ,4,6) |((shuffle((X+transpose(X,12) ) ) |((step(X,12) +transpose((X|X) ,4) ) +transpose((X+X) ,7) ) ) |((transpose((X+transpose(X,7) ) ,-7) +transpose(shuffle((X+transpose(X,7) ) ) ,7) ) +transpose(step(transpose(X,4) ,12) ,7) ) ) ) ,12) ) +transpose((arpeggio((transpose(step(arpeggio(X) ,12) ,-5) +transpose(transpose(shuffle((arpeggio(X) |step(X,12) ) ) ,4) ,12) ) ) +transpose((transpose(((X+transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,4) +transpose(echo(step(X,12) ,4,6) ,12) ) ,7) ) ,7) ) ) ) +transpose((((arpeggio((((X+transpose(((shuffle(X) +transpose(X,4) ) +transpose(transpose(echo(step(X,12) ,4,6) ,-7) ,7) ) ,4) ) +transpose(transpose(transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ,-7) ,7) ) +transpose(transpose(arpeggio(transpose(X,-5) ) ,4) ,12) ) ) +transpose(transpose(((X+transpose(X,7) ) +transpose(step(X,12) ,7) ) ,-5) ,-7) ) +transpose(((transpose(echo(transpose((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((transpose(X,-7) +transpose(X,12) ) ,12) ) ,-5) +transpose(transpose((transpose(transpose(arpeggio(X) ,-5) ,-7) +transpose(transpose(transpose(X,4) ,4) ,7) ) ,4) ,12) ) ,-7) ,4,6) ,-7) +transpose(shuffle((transpose(((((((X|X) +transpose(X,4) ) +transpose(X,7) ) +echo(X,4,6) ) +echo(((X+transpose(X,4) ) +transpose(step(X,12) ,7) ) ,4,6) ) +transpose(transpose(transpose(shuffle(echo(X,4,6) ) ,-7) ,-5) ,7) ) ,-7) +transpose((transpose(transpose(transpose((shuffle(X) +transpose(X,12) ) ,-5) ,-7) ,-7) +transpose(transpose(((arpeggio(X) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,12) ) +transpose(X,7) ) ,-7) ,12) ) ,12) ) ) ,4) ) +transpose(transpose((((transpose(transpose((arpeggio(X) +transpose(step(X,12) ,7) ) ,-7) ,-7) +transpose(arpeggio(step((((X+transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) +transpose((transpose(transpose(X,-7) ,-7) +transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,7) ) ,7) ) ,12) ) ,12) ) +transpose(((transpose(X,-7) +transpose(echo(echo(transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) ,4,6) ,4,6) ,7) ) +transpose(((step(echo(transpose(X,-7) ,4,6) ,12) +transpose(step(transpose((X+transpose(X,7) ) ,4) ,12) ,12) ) +transpose(transpose(((X|(X+transpose(X,7) ) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) ,4) ,7) ) ,7) ) ,4) ) +transpose(transpose((((((X+transpose((X+echo(X,4,6) ) ,12) ) +transpose(transpose(arpeggio((X+transpose(X,7) ) ) ,-5) ,4) ) +transpose(transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,-7) ,7) ) +transpose(X,4) ) +transpose(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose((X+transpose(shuffle(transpose((X|X) ,-5) ) ,12) ) ,4) ) +transpose(((transpose(((X+transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) ,-7) +transpose(transpose(((X+transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) ,-7) ,4) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ,7) ) ,-5) ,7) ) ,4) ,7) ) ,4) ) +transpose(transpose(echo(step((((((((X|X) +transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose((transpose(shuffle(X) ,-7) +transpose(((X+transpose(X,7) ) |X) ,12) ) ,7) ) +shuffle(transpose(X,-5) ) ) ,12) ,4,6) ,-7) ,7) ) ,7) ) ,-7) ,4) ) +transpose((arpeggio((transpose((((echo(X,4,6) +transpose(((X+X) +transpose(step(arpeggio(X) ,12) ,7) ) ,7) ) +transpose(transpose(((X|X) +transpose((X+transpose(X,12) ) ,7) ) ,-7) ,4) ) +transpose((echo(transpose(X,-7) ,4,6) |transpose(step(X,12) ,-5) ) ,7) ) ,-5) +transpose(transpose(arpeggio((echo(transpose(step(X,12) ,-7) ,4,6) +transpose((X+transpose(X,7) ) ,12) ) ) ,-7) ,12) ) ) +(((echo((X+transpose(((echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,7) ) ,4,6) |((transpose((((step(X,12) +transpose((X+transpose(X,12) ) ,4) ) +transpose(echo(X,4,6) ,7) ) +transpose((X+transpose(X,12) ) ,4) ) ,-7) +transpose((((transpose(X,-7) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(arpeggio((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(step(X,12) ,7) ) ) ,7) ) ,4) ) +transpose(echo(transpose(transpose(transpose(X,4) ,-7) ,4) ,4,6) ,7) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) +transpose((transpose(echo(((echo(X,4,6) +transpose((step(X,12) +transpose(shuffle(X) ,7) ) ,4) ) +transpose(echo(arpeggio(transpose(X,4) ) ,4,6) ,7) ) ,4,6) ,-7) +transpose(transpose((arpeggio(transpose(X,-7) ) +transpose((shuffle((X+transpose(X,7) ) ) +transpose(echo(transpose((X+transpose(X,12) ) ,4) ,4,6) ,7) ) ,-5) ) ,-7) ,7) ) ,12) ) ) ,7) ) +transpose(echo(transpose(shuffle(echo(transpose((transpose(transpose((arpeggio(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) +transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-7) ) ,-7) ,-7) +step(echo((shuffle(arpeggio(X) ) +arpeggio((X+transpose(arpeggio(X) ,12) ) ) ) ,4,6) ,12) ) ,-7) ,4,6) ) ,-7) ,4,6) ,7) )
random seed used was 0

NOTE: Generated phrase was too large ( 11748 ) , it has been truncated at 5000 notes. EXPR = transpose(transpose(shuffle(transpose(((((shuffle(step(transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,4) ,12) ) |transpose((transpose(((X+transpose(X,7) ) +transpose((X+transpose(shuffle(transpose(X,-7) ) ,12) ) ,7) ) ,4) +transpose((((echo((transpose(X,-7) +(X+transpose(X,12) ) ) ,4,6) +transpose(echo(X,4,6) ,12) ) +transpose(transpose((((X+transpose(X,12) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,-5) ,4) ) +transpose((step(transpose(X,-7) ,12) +transpose(X,7) ) ,7) ) ,12) ) ,4) ) +transpose((echo(echo(step(((transpose(shuffle(X) ,4) +transpose(shuffle(echo(X,4,6) ) ,4) ) +transpose(arpeggio(((X+transpose(X,7) ) +transpose(X,7) ) ) ,7) ) ,12) ,4,6) ,4,6) +((transpose((X+transpose(X,12) ) ,4) +shuffle(transpose(X,-7) ) ) +transpose(echo(echo(((((X+transpose(X,7) ) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(X,7) ) ,4,6) ,4,6) ,12) ) ) ,4) ) +transpose(transpose((step(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,12) +transpose(echo(step(X,12) ,4,6) ,12) ) ,-7) ,7) ) |arpeggio(arpeggio(((((echo(X,4,6) +transpose(step(X,12) ,4) ) +transpose(X,7) ) |(X+transpose(X,12) ) ) +transpose(step(echo(transpose((step(((X+transpose(X,7) ) +X) ,12) +transpose(shuffle((arpeggio(X) +transpose(transpose(echo(X,4,6) ,-7) ,7) ) ) ,7) ) ,-5) ,4,6) ,12) ,12) ) ) ) ) ,-5) ) ,-5) ,-7)
random seed used was 0


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