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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Phrase for X:
# of Tracks:
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After 18 generations the expression "X" became this:
(arpeggio(echo(echo(transpose((shuffle(((((arpeggio((arpeggio(X) +transpose(arpeggio(X) ,7) ) ) +transpose(arpeggio(shuffle(echo(X,4,6) ) ) ,4) ) +transpose(transpose((echo(transpose(X,4) ,4,6) |(X|X) ) ,-5) ,7) ) +transpose(echo(transpose((echo(X,4,6) +transpose(echo(X,4,6) ,7) ) ,-5) ,4,6) ,4) ) +transpose(echo(step(transpose(((step(X,12) +transpose(X,7) ) +transpose(X,7) ) ,4) ,12) ,4,6) ,7) ) ) |((((shuffle(transpose(step((X+transpose(transpose(X,-5) ,7) ) ,12) ,-5) ) +transpose(transpose((transpose(transpose(transpose(X,4) ,4) ,4) +step(shuffle(X) ,12) ) ,4) ,7) ) |((((X+transpose(X,7) ) +transpose(arpeggio(X) ,12) ) +transpose((((X+transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(((X+transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) ,4) ) +transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ) +transpose((echo(((arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(((((step(X,12) +transpose(step(X,12) ,4) ) +transpose((arpeggio((X+transpose(X,12) ) ) +transpose(shuffle(step(X,12) ) ,12) ) ,7) ) +transpose(((transpose(X,-5) +transpose(X,4) ) +transpose((arpeggio(X) +transpose(step(X,12) ,12) ) ,7) ) ,4) ) +transpose(echo((X+X) ,4,6) ,7) ) ,4) ) +transpose(arpeggio(((shuffle(X) +transpose(transpose(X,4) ,4) ) +transpose(((X+transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ) ,7) ) ,4,6) |shuffle(((shuffle((((X+transpose(X,7) ) |(X+transpose(transpose(X,4) ,7) ) ) +transpose((X+shuffle(X) ) ,7) ) ) +transpose(step(step((shuffle(X) +transpose((X+transpose((X|X) ,7) ) ,7) ) ,12) ,12) ,12) ) +transpose((transpose(step(((shuffle(X) +transpose(X,4) ) +transpose(X,7) ) ,12) ,4) +transpose((transpose((echo((X|X) ,4,6) |(X+transpose(X,7) ) ) ,4) +transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(echo(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(echo((X+transpose(X,7) ) ,4,6) ,7) ) ,4,6) ,7) ) ,7) ) ,7) ) ,12) ) ) ) ,4) ) +transpose((transpose(shuffle(transpose(X,4) ) ,-7) +transpose(step(transpose((step(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,12) +((X|X) +transpose(echo(((X+transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) ,4,6) ,7) ) ) ,4) ,12) ,12) ) ,7) ) ) ,4) ,4,6) ,4,6) ) +transpose(transpose(((echo((shuffle(arpeggio((shuffle(X) +transpose(step((echo(transpose(step(X,12) ,4) ,4,6) +transpose((X+transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,7) ) ,12) ,7) ) ) ) +transpose(transpose(transpose(shuffle(shuffle(echo(step(step((arpeggio(X) |(X+X) ) ,12) ,12) ,4,6) ) ) ,4) ,4) ,12) ) ,4,6) +transpose(((transpose(transpose((transpose(((step((X|X) ,12) |arpeggio(((X+transpose(step(X,12) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ) +transpose(transpose(X,-5) ,4) ) ,-5) |transpose(transpose(echo(echo(shuffle(X) ,4,6) ,4,6) ,-5) ,-5) ) ,-7) ,-7) +transpose((echo(shuffle((((X+transpose(X,7) ) +transpose(X,7) ) |transpose(((X+transpose(X,7) ) |X) ,-5) ) ) ,4,6) +(arpeggio(arpeggio(transpose((transpose(X,4) +transpose(shuffle((step(X,12) +transpose(transpose(X,4) ,12) ) ) ,7) ) ,-5) ) ) +step(arpeggio((transpose(X,-7) +X) ) ,12) ) ) ,4) ) +transpose(shuffle(step((X|transpose(X,-7) ) ,12) ) ,7) ) ,7) ) |((transpose(shuffle((shuffle((echo(((((X+X) +transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) +transpose(shuffle(step(((X+transpose(X,7) ) +transpose(step(X,12) ,7) ) ,12) ) ,7) ) ) |((((echo(echo(arpeggio(transpose(X,-7) ) ,4,6) ,4,6) +transpose(arpeggio(echo(shuffle(X) ,4,6) ) ,7) ) +transpose(transpose(step(echo(transpose(X,-7) ,4,6) ,12) ,-5) ,7) ) +transpose(echo((arpeggio(transpose(X,-7) ) +transpose(transpose(arpeggio(X) ,4) ,7) ) ,4,6) ,4) ) +transpose(transpose((((((arpeggio(echo(X,4,6) ) |echo((X|X) ,4,6) ) +transpose(((arpeggio(X) +transpose((X+transpose(X,7) ) ,7) ) +transpose(X,7) ) ,7) ) +transpose(transpose(arpeggio(X) ,4) ,4) ) +transpose(((X+transpose((X+transpose(X,7) ) ,7) ) +transpose((X+transpose(X,7) ) ,12) ) ,7) ) +transpose(echo(((X+transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |X) |transpose(X,4) ) ,4) ) +transpose(arpeggio(step(transpose(X,-7) ,12) ) ,7) ) ,4,6) ,12) ) ,4) ,7) ) ) ) ,-7) +transpose((((transpose((X|transpose(X,-7) ) ,4) +transpose(transpose((echo(echo((((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(transpose(arpeggio((X+transpose(X,7) ) ) ,-7) ,7) ) ,4,6) ,4,6) +transpose(step((step(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose((((X+transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) ,-7) ,7) ) ,-5) ,12) +transpose(((((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +transpose(echo(((X+transpose(X,7) ) |(X+X) ) ,4,6) ,12) ) +((step(X,12) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) +transpose(transpose((X+X) ,-7) ,4) ) +transpose(echo(transpose(transpose(X,-7) ,4) ,4,6) ,7) ) ,12) ) ,12) ,7) ) ,4) ,4) ) +transpose(((shuffle((X|X) ) +transpose((((echo((X+shuffle(echo(X,4,6) ) ) ,4,6) +transpose(((shuffle((X+transpose(X,7) ) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((transpose(X,4) +((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) ) ,7) ) ,4) ) +transpose((transpose(shuffle(arpeggio(X) ) ,-5) |step(shuffle(step(X,12) ) ,12) ) ,7) ) +shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,7) ) +transpose(shuffle(echo(X,4,6) ) ,7) ) ,7) ) +transpose(transpose((transpose(shuffle(shuffle(step((((X+transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) |step(step(X,12) ,12) ) ,12) ) ) ,-5) +transpose(step(((transpose((transpose(X,4) |arpeggio(X) ) ,4) +transpose((X+transpose(arpeggio(X) ,7) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ,7) ) ,-7) ,7) ) ,4) ) +transpose((arpeggio(arpeggio(((transpose(((X+transpose(X,7) ) |step(((X|X) +transpose(step(X,12) ,7) ) ,12) ) ,4) +transpose((((transpose(((echo(step(X,12) ,4,6) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,4) +step(X,12) ) +transpose(echo(transpose(X,-5) ,4,6) ,4) ) +transpose((((step(X,12) +transpose(((X+transpose(transpose(X,-5) ,4) ) +transpose(shuffle(X) ,7) ) ,7) ) +echo(arpeggio(X) ,4,6) ) +arpeggio(((X+transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ) ,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ) +arpeggio(transpose((arpeggio(echo((X+transpose(transpose(X,-7) ,7) ) ,4,6) ) |shuffle(transpose((X+transpose(X,7) ) ,-5) ) ) ,-7) ) ) ,7) ) ) ,4) ,7) )
random seed used was 6

NOTE: Generated phrase was too large ( 9903 ) , it has been truncated at 5000 notes. EXPR = ((((((((shuffle(X) |echo(echo(X,4,6) ,4,6) ) +transpose(transpose(((echo((X+transpose(X,7) ) ,4,6) +transpose(transpose((X|arpeggio(X) ) ,-5) ,4) ) +transpose(arpeggio(X) ,7) ) ,4) ,7) ) +(echo(((echo(X,4,6) +transpose(arpeggio(step(X,12) ) ,7) ) +arpeggio(transpose(X,-7) ) ) ,4,6) |shuffle(shuffle(X) ) ) ) +transpose(transpose(transpose(transpose((arpeggio(X) |((X+X) +transpose((X+transpose(X,7) ) ,7) ) ) ,4) ,4) ,4) ,4) ) +transpose((echo((echo(((transpose(X,4) +transpose(echo(X,4,6) ,7) ) +transpose((step(X,12) +transpose(echo(X,4,6) ,12) ) ,7) ) ,4,6) |transpose((((X+transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) |transpose(X,4) ) ,-7) ) ,4,6) +(((X+transpose(shuffle(X) ,7) ) +transpose((echo(X,4,6) |((transpose(X,-5) +transpose(step(X,12) ,4) ) +transpose(arpeggio(X) ,7) ) ) ,-7) ) +transpose(arpeggio(transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,-5) ) ,7) ) ) ,7) ) +transpose(step(step(((echo(transpose((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) ,-7) ,4,6) +transpose((((((((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose(shuffle(step(X,12) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,7) ) +transpose(transpose(transpose((X|X) ,4) ,4) ,7) ) +transpose((((X+transpose(shuffle(X) ,4) ) +transpose((X|X) ,7) ) +transpose((((arpeggio(transpose(X,-5) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((X+transpose(arpeggio(X) ,7) ) ,4) ) +transpose(step(X,12) ,7) ) ,7) ) ,7) ) +transpose(echo(echo(step(X,12) ,4,6) ,4,6) ,4) ) +transpose((((((echo(transpose(X,4) ,4,6) +(arpeggio(step(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ) +transpose(step(X,12) ,4) ) +transpose(echo(step((echo(X,4,6) +X) ,12) ,4,6) ,7) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(step(echo(shuffle(transpose(X,4) ) ,4,6) ,12) ,7) ) ,7) ) ,4) ) +transpose((arpeggio((arpeggio(X) +transpose(transpose(X,-7) ,7) ) ) |(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) |shuffle(step(echo(X,4,6) ,12) ) ) ) ,7) ) ,12) ,12) ,12) ) |transpose(transpose(shuffle(step(((arpeggio(X) +transpose(((((X+transpose(X,7) ) |step(transpose(X,4) ,12) ) +transpose(arpeggio(echo(X,4,6) ) ,4) ) +transpose((transpose(X,4) |(transpose(X,-5) +transpose((X|X) ,7) ) ) ,7) ) ,4) ) +transpose(echo((transpose((X+transpose(X,7) ) ,-5) +transpose(X,12) ) ,4,6) ,7) ) ,12) ) ,-5) ,4) ) +((echo(((step((((echo(shuffle(echo(((((X+X) +transpose((X+transpose(X,7) ) ,7) ) +transpose((X+step(X,12) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,4,6) ) ,4,6) +((arpeggio((((X+transpose(X,12) ) |transpose(arpeggio((X+transpose(X,7) ) ) ,-5) ) |echo((step(transpose(X,-7) ,12) +transpose(transpose((shuffle(X) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ,7) ) ,4,6) ) ) +transpose(step((((echo((X+transpose(X,12) ) ,4,6) +arpeggio(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ) +transpose(((((transpose(X,-5) +transpose((X+transpose(X,12) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) |echo(X,4,6) ) +transpose(step(echo(((transpose(arpeggio(X) ,4) +transpose((X|transpose(X,-7) ) ,4) ) +transpose(step(X,12) ,7) ) ,4,6) ,12) ,12) ) ,4) ) +transpose((echo(step(X,12) ,4,6) |shuffle(transpose(X,4) ) ) ,7) ) ,12) ,4) ) +transpose(echo(((transpose((transpose(arpeggio((X+transpose(X,7) ) ) ,4) +transpose(transpose(X,4) ,7) ) ,-5) +transpose(step(echo(echo(shuffle(X) ,4,6) ,4,6) ,12) ,4) ) +transpose(echo(step((X|X) ,12) ,4,6) ,7) ) ,4,6) ,7) ) ) +transpose((shuffle(((shuffle(X) +transpose(X,7) ) +transpose(arpeggio((X+X) ) ,7) ) ) +transpose(transpose(transpose(step((((echo((X+transpose(step(X,12) ,12) ) ,4,6) +arpeggio(arpeggio(echo(X,4,6) ) ) ) +transpose(shuffle((shuffle(arpeggio(X) ) +echo(X,4,6) ) ) ,4) ) +transpose((((X+X) +transpose(step(X,12) ,7) ) +(X+transpose((X+transpose(X,12) ) ,7) ) ) ,7) ) ,12) ,-5) ,4) ,7) ) ,4) ) +transpose(transpose((step(transpose(arpeggio(transpose(((transpose(X,4) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,-7) ) ,-5) ,12) +transpose((((((transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) +shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose((X+transpose((X|X) ,-7) ) ,12) ) +transpose(transpose(shuffle(transpose(X,-5) ) ,-7) ,4) ) +transpose(transpose(((step(step(X,12) ,12) +transpose((transpose(X,-5) |step(transpose((X|X) ,-5) ,12) ) ,4) ) +transpose((transpose(step(X,12) ,4) +transpose((X+arpeggio(X) ) ,12) ) ,7) ) ,-5) ,7) ) +transpose(arpeggio(((transpose(echo(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,4,6) ,4) +transpose((arpeggio((X+transpose(X,12) ) ) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ) ,12) ) ,7) ) ,-5) ,7) ) ,12) |shuffle(step(((transpose(step(echo(echo(transpose((((X+X) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(X,7) ) ,-5) ,4,6) ,4,6) ,12) ,4) +transpose((((shuffle((transpose((X+X) ,4) +transpose((X|X) ,7) ) ) +transpose(((X+transpose(X,-5) ) +transpose(step(X,12) ,12) ) ,7) ) |(transpose(transpose(shuffle((echo(transpose(X,4) ,4,6) +transpose((X|X) ,7) ) ) ,-5) ,4) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(X,4,6) ,4) ) +transpose(shuffle(X) ,7) ) |step(X,12) ) ,7) ) ) |transpose(transpose(shuffle((echo(X,4,6) +transpose(X,7) ) ) ,-5) ,-5) ) ,7) ) +transpose((arpeggio(transpose((arpeggio(echo(X,4,6) ) |transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) ) ,4) ) +transpose(arpeggio(transpose((((((((X+transpose(X,7) ) +transpose(step(X,12) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose((transpose(transpose(X,4) ,-5) +transpose((step(X,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,4) ) +transpose(transpose(step(X,12) ,-5) ,7) ) +transpose(((X+transpose(X,12) ) +(transpose(X,-5) +X) ) ,4) ) +transpose(step(transpose(shuffle(X) ,-5) ,12) ,7) ) ,4) ) ,7) ) ,12) ) ,12) ) ) +transpose(step(transpose(echo(arpeggio((echo((transpose((X|X) ,-5) |(((X+transpose(X,12) ) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) ) ,4,6) |echo(X,4,6) ) ) ,4,6) ,4) ,12) ,7) ) ,4,6) +transpose(step(((((step(transpose(step(transpose(echo(X,4,6) ,4) ,12) ,-5) ,12) +transpose((((((shuffle((X|X) ) +transpose(transpose((transpose(X,-7) +transpose((X+X) ,7) ) ,4) ,4) ) +transpose(transpose((echo(X,4,6) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,-7) ,7) ) +transpose((transpose(step((X+transpose(X,7) ) ,12) ,4) |transpose((X+transpose(X,7) ) ,-7) ) ,12) ) |echo((((arpeggio(X) |(shuffle((X+X) ) +(X+X) ) ) +transpose((((X+transpose(X,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,4) ) +transpose(((X|X) +transpose(transpose((X+X) ,4) ,7) ) ,7) ) ,4) ) +transpose(((X+X) |((X|X) |(X|X) ) ) ,7) ) ,4,6) ) +transpose(((((shuffle((X+transpose(X,7) ) ) +arpeggio((transpose(X,-5) +transpose(echo(X,4,6) ,12) ) ) ) +transpose(arpeggio(echo(X,4,6) ) ,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose((arpeggio((X+X) ) +transpose(X,12) ) ,7) ) ,12) ) ,4) ) +transpose((shuffle(((((((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +transpose(X,4) ) +transpose(echo((X+transpose(transpose(X,4) ,12) ) ,4,6) ,7) ) +transpose((((X+transpose(X,4) ) +transpose(shuffle(X) ,7) ) +transpose(((arpeggio(X) +transpose((X+transpose(X,7) ) ,7) ) |transpose(X,-5) ) ,7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) +transpose((transpose(X,-7) +transpose(shuffle(transpose(X,4) ) ,7) ) ,4) ) +transpose(transpose(shuffle(arpeggio(((X|echo(X,4,6) ) +transpose((shuffle(X) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ) ) ,4) ,7) ) ) +transpose(transpose((((transpose(((X+transpose(step(shuffle(arpeggio(X) ) ,12) ,4) ) +transpose((transpose(X,-5) +transpose(shuffle(echo(X,4,6) ) ,7) ) ,7) ) ,-7) +transpose(echo((arpeggio(X) +(X+transpose(X,7) ) ) ,4,6) ,12) ) +transpose((shuffle(echo((step(X,12) |step(transpose(X,-7) ,12) ) ,4,6) ) +((((step(X,12) +transpose((X|X) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(arpeggio(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,4) ) +transpose(((arpeggio(transpose(X,-5) ) +transpose((arpeggio((X|X) ) +echo(X,4,6) ) ,4) ) +transpose(shuffle(echo((arpeggio(X) +transpose(X,12) ) ,4,6) ) ,7) ) ,7) ) ) ,4) ) +transpose((step(shuffle(((shuffle(X) +transpose(transpose((X+transpose(X,7) ) ,-7) ,4) ) +transpose(arpeggio(echo((X+transpose(X,7) ) ,4,6) ) ,7) ) ) ,12) +transpose(transpose(transpose(shuffle((X+transpose(step(X,12) ,7) ) ) ,-5) ,4) ,12) ) ,7) ) ,-7) ,7) ) ,7) ) +transpose(transpose(shuffle(echo(transpose((((echo(echo(X,4,6) ,4,6) +transpose((X+transpose((X+transpose(X,7) ) ,7) ) ,7) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,4) ) +transpose(transpose((echo(X,4,6) +transpose(X,12) ) ,4) ,7) ) ,-5) ,4,6) ) ,4) ,4) ) +transpose(echo(arpeggio(step(transpose((transpose(((echo(X,4,6) +transpose(arpeggio(X) ,4) ) +transpose(shuffle(X) ,7) ) ,4) +transpose(shuffle(echo((X+transpose(X,12) ) ,4,6) ) ,7) ) ,-5) ,12) ) ,4,6) ,7) ) ,12) ,4) ) +transpose((echo(arpeggio(((shuffle(((transpose((X+X) ,-7) +transpose((((shuffle(X) +transpose((step(X,12) |transpose(X,4) ) ,7) ) +transpose((shuffle(X) +echo(X,4,6) ) ,4) ) +transpose(arpeggio(step(transpose(X,-5) ,12) ) ,7) ) ,4) ) +transpose(arpeggio(step(transpose(X,-5) ,12) ) ,7) ) ) +transpose((X+transpose(transpose(echo(X,4,6) ,-7) ,12) ) ,7) ) +transpose(((arpeggio(arpeggio((((X+transpose(X,7) ) +X) +transpose((X+X) ,7) ) ) ) +transpose(arpeggio(shuffle((transpose(X,4) +transpose(step(X,12) ,12) ) ) ) ,7) ) +transpose(transpose((step(((transpose(transpose(X,4) ,-7) +transpose((X+transpose(X,7) ) ,4) ) +transpose(((X+echo(X,4,6) ) +(X+X) ) ,7) ) ,12) +transpose((X|(((X+transpose(X,4) ) +transpose(echo(X,4,6) ,4) ) +transpose((X|(X+transpose(X,7) ) ) ,7) ) ) ,12) ) ,4) ,7) ) ,7) ) ) ,4,6) +transpose(step((((echo((((echo(transpose(echo(step(X,12) ,4,6) ,-5) ,4,6) |(transpose((step(X,12) +echo(transpose(X,4) ,4,6) ) ,-5) +((transpose((X+transpose(X,7) ) ,-7) |transpose(step(X,12) ,-7) ) +step(step(step(X,12) ,12) ,12) ) ) ) +transpose(arpeggio(step((shuffle(shuffle((X+transpose(X,12) ) ) ) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) ,12) ) ,4) ) +transpose(arpeggio(shuffle(transpose(echo((X+transpose((X+transpose(X,7) ) ,7) ) ,4,6) ,-5) ) ) ,7) ) ,4,6) +transpose((((transpose((arpeggio(X) +arpeggio(((X+transpose(X,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ) ,-7) |transpose((shuffle((X|(X+transpose(X,7) ) ) ) +transpose(transpose(echo(X,4,6) ,-7) ,7) ) ,4) ) +transpose((echo(step(transpose(X,4) ,12) ,4,6) +((((echo((X+transpose(X,12) ) ,4,6) +transpose(transpose(((X+transpose(arpeggio(X) ,7) ) +step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) ,4) ) +transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) +transpose(((arpeggio(transpose(X,4) ) +transpose(echo(transpose((X+transpose(X,12) ) ,-7) ,4,6) ,12) ) +transpose(step(X,12) ,7) ) ,7) ) +transpose(shuffle((((arpeggio(arpeggio(transpose(X,-5) ) ) +transpose(shuffle(X) ,7) ) +transpose((((step((X+transpose(X,7) ) ,12) +transpose((transpose(X,4) +(X+transpose(X,12) ) ) ,7) ) +transpose((transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) +transpose((echo(X,4,6) +(((X+transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ) ,12) ) ,4) ) +transpose((echo(X,4,6) +transpose(arpeggio((X+transpose(X,7) ) ) ,7) ) ,7) ) ,4) ) +transpose(step(transpose(echo(X,4,6) ,-5) ,12) ,7) ) ) ,7) ) ) ,7) ) |((arpeggio((transpose((X+X) ,-5) |transpose(echo(X,4,6) ,-7) ) ) +transpose((((transpose(arpeggio(X) ,4) +shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose((X|X) ,4) ) +transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(step(X,12) ,7) ) ,7) ) ,12) ) +((transpose(arpeggio((((step(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,12) +transpose(arpeggio((X|X) ) ,4) ) +transpose((((X|X) |transpose((X+X) ,4) ) +transpose((echo(X,4,6) +transpose(transpose(X,-7) ,7) ) ,7) ) ,7) ) +transpose(arpeggio(((echo(transpose(X,-5) ,4,6) +transpose(step(shuffle(X) ,12) ,4) ) +transpose(echo(arpeggio(X) ,4,6) ,7) ) ) ,7) ) ) ,4) +transpose((step(arpeggio((((arpeggio(X) +transpose(transpose(X,-7) ,4) ) +transpose(shuffle(X) ,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,12) +transpose(transpose(step((((X|X) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,4) ,7) ) ,12) ,-7) ,7) ) ,4) ) +transpose(((((transpose(transpose(X,4) ,4) +transpose(transpose(transpose((X+X) ,-7) ,4) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(transpose(X,4) ,4) ) ,7) ) +transpose(echo((echo((X+transpose(X,7) ) ,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,4,6) ,12) ) +transpose(arpeggio(((X|X) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,7) ) ,7) ) ) ) ,7) ) +transpose((transpose((((arpeggio((transpose(X,-7) +(X|X) ) ) +(((transpose(arpeggio(X) ,-5) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(echo(arpeggio(shuffle(arpeggio(X) ) ) ,4,6) ,4) ) +transpose(((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |(transpose(X,-5) |transpose(echo(X,4,6) ,-5) ) ) ,7) ) ) +transpose(step(transpose(echo(X,4,6) ,4) ,12) ,4) ) +transpose(transpose(transpose(arpeggio(arpeggio((X+X) ) ) ,-5) ,-5) ,7) ) ,-7) +((shuffle(transpose(X,4) ) +transpose(echo(shuffle((((transpose(X,4) |transpose(X,-7) ) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,4) ,7) ) ) ,4,6) ,7) ) +transpose(shuffle(((((shuffle(transpose((X+transpose(X,12) ) ,4) ) +transpose(((((transpose(X,4) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(X,12) ) +(transpose(X,-5) |echo(transpose(X,4) ,4,6) ) ) ,4) ) +transpose((echo(shuffle(X) ,4,6) +echo(X,4,6) ) ,7) ) +transpose((transpose(X,-5) +(step(X,12) |transpose((X|shuffle(X) ) ,4) ) ) ,4) ) +transpose(((step((X+X) ,12) +X) +transpose((((step(X,12) +transpose(transpose(X,4) ,4) ) +transpose(step(X,12) ,7) ) |arpeggio(arpeggio(X) ) ) ,7) ) ,7) ) ) ,7) ) ) ,4) ) +transpose((((((shuffle(echo((transpose(X,-5) +transpose((X+transpose(X,12) ) ,7) ) ,4,6) ) +(((transpose(transpose((transpose(X,-5) +X) ,-5) ,4) |echo(((X+transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ) +transpose((transpose(X,-5) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +echo(X,4,6) ) +X) +transpose((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,7) ) ,4) ) +transpose((((step(arpeggio(X) ,12) |((step(X,12) +transpose((X+X) ,4) ) +transpose(transpose(X,-5) ,7) ) ) +transpose((((step(X,12) +(echo(X,4,6) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(X,7) ) +arpeggio(echo(arpeggio(step(X,12) ) ,4,6) ) ) ,4) ) +transpose(((arpeggio(X) +transpose(echo(transpose(step(X,12) ,4) ,4,6) ,4) ) +transpose(arpeggio(shuffle(echo(echo(X,4,6) ,4,6) ) ) ,7) ) ,7) ) ,7) ) ) +transpose((((transpose(transpose((((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(step(X,12) ,-7) ,7) ) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,4) ,-7) +transpose(transpose((transpose(X,-7) +transpose(X,7) ) ,-7) ,7) ) +transpose(step(((transpose((X+transpose(X,7) ) ,-7) +transpose(shuffle((X+transpose(transpose(X,-5) ,12) ) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ,7) ) ,12) ,4) ) +transpose((arpeggio(transpose(echo(X,4,6) ,4) ) |transpose(((step(X,12) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-5) ) ,7) ) ,7) ) +transpose(transpose(shuffle(transpose(((((X+X) +transpose(shuffle(X) ,12) ) +step(X,12) ) +(step(X,12) |(((X+transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) +X) ) ) ,4) ) ,-7) ,4) ) +transpose(echo(shuffle(echo(transpose(((shuffle(X) +transpose(transpose(X,-7) ,4) ) +transpose(step(X,12) ,7) ) ,4) ,4,6) ) ,4,6) ,7) ) +transpose(step(shuffle(((transpose(transpose(transpose(transpose(shuffle(X) ,-5) ,-5) ,-7) ,-5) |(((X+((X|echo(X,4,6) ) |shuffle(X) ) ) +transpose(step(((X+transpose(X,7) ) |arpeggio(echo(X,4,6) ) ) ,12) ,4) ) +transpose(echo(echo((shuffle(X) |X) ,4,6) ,4,6) ,7) ) ) +arpeggio(transpose(step((X+transpose((X|X) ,7) ) ,12) ,-5) ) ) ) ,12) ,4) ) ,7) ) ,12) ,7) ) ,7) ) )
random seed used was 0

NOTE: Generated phrase was too large ( 6823 ) , it has been truncated at 5000 notes. EXPR = shuffle(echo(step(transpose(echo((transpose((((((X+X) +transpose(echo(X,4,6) ,4) ) +transpose((X+transpose(echo(X,4,6) ,7) ) ,7) ) +transpose(arpeggio(X) ,4) ) +transpose((echo(echo(X,4,6) ,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,-5) +transpose(transpose(transpose(arpeggio(echo((X|X) ,4,6) ) ,-5) ,4) ,12) ) ,4,6) ,-7) ,12) ,4,6) )
random seed used was 0 EXPR = transpose((transpose(shuffle((((step((echo(shuffle(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,4,6) +transpose((shuffle((X+transpose(X,7) ) ) +transpose((step(step(X,12) ,12) +transpose(((X+transpose(X,7) ) |X) ,12) ) ,7) ) ,7) ) ,12) +transpose(transpose(shuffle(echo((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +transpose(echo((X+transpose(X,7) ) ,4,6) ,7) ) ,4,6) ) ,-5) ,7) ) +transpose(((step((X+transpose(X,7) ) ,12) +transpose(transpose(((((echo(X,4,6) +transpose(transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ,4) ) +transpose((transpose(transpose(X,-5) ,-5) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) ,7) ) +transpose(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ,-5) ,4) ) +transpose((((((((X+transpose(X,4) ) +transpose(X,7) ) +X) +transpose(((X|X) +transpose((X+X) ,7) ) ,4) ) +transpose(shuffle((X|X) ) ,7) ) +transpose(arpeggio(((X|X) +shuffle(X) ) ) ,4) ) +transpose(shuffle(((X+transpose(X,12) ) +X) ) ,7) ) ,7) ) ,-7) ,4) ) +transpose(shuffle(arpeggio(arpeggio(echo(shuffle(step(X,12) ) ,4,6) ) ) ) ,7) ) ,4) ) +transpose((shuffle(arpeggio((step(X,12) +transpose(X,-5) ) ) ) |(transpose((((arpeggio((X+transpose(X,7) ) ) |((step(X,12) +transpose(X,4) ) +transpose(X,7) ) ) +transpose(transpose(((X+transpose(X,12) ) +transpose(echo(X,4,6) ,7) ) ,-7) ,4) ) +transpose(arpeggio(X) ,7) ) ,-7) +transpose(step(transpose((step((X+X) ,12) +X) ,4) ,12) ,7) ) ) ,7) ) ) ,4) +transpose((transpose(((transpose(echo(echo(X,4,6) ,4,6) ,4) +transpose(((transpose(echo(echo(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4,6) ,4,6) ,4) +step(((X|X) +transpose(X,-5) ) ,12) ) +transpose((((transpose(transpose(((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ,-7) +transpose(shuffle((((transpose((X+X) ,-7) +transpose((X|X) ,-7) ) +transpose(transpose(X,-5) ,7) ) +transpose((((X+transpose(X,7) ) +transpose((X+X) ,7) ) +(((X+X) +(X+transpose(X,7) ) ) |arpeggio(step(X,12) ) ) ) ,7) ) ) ,7) ) |((shuffle((X+transpose(transpose(X,4) ,7) ) ) +transpose(echo(echo(X,4,6) ,4,6) ,4) ) +transpose(step(transpose(arpeggio(X) ,4) ,12) ,7) ) ) |echo((shuffle((shuffle(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(((X+X) |transpose(X,4) ) ,7) ) ) +transpose(((transpose(X,4) |(X+transpose(X,7) ) ) +transpose((((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,7) ) ) |((((X+X) +X) +transpose(transpose(X,-5) ,7) ) +transpose((((X+X) +transpose(X,12) ) +transpose(transpose(X,-7) ,7) ) ,7) ) ) ,4,6) ) ,7) ) ,4) ) +transpose(((((transpose(X,-7) +transpose((echo(((X+transpose(shuffle(shuffle(X) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ,4,6) +(((shuffle(X) |X) +(X+transpose(X,7) ) ) +transpose((X+transpose(transpose(X,-7) ,7) ) ,7) ) ) ,12) ) |arpeggio(step(transpose(arpeggio(echo(transpose((X+X) ,4) ,4,6) ) ,4) ,12) ) ) |((transpose((step((X|arpeggio(X) ) ,12) +echo((X+transpose(X,7) ) ,4,6) ) ,4) +transpose((((echo(shuffle(X) ,4,6) +transpose(arpeggio((X+transpose(arpeggio(X) ,7) ) ) ,12) ) +transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) |(X+transpose(X,12) ) ) ,4) ) +transpose(((((arpeggio(transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,-7) ,7) ) +transpose(((arpeggio((X+transpose(X,7) ) ) +transpose(((X+X) |transpose(X,4) ) ,4) ) +transpose((((step(X,12) |echo(X,4,6) ) +transpose(step(shuffle(X) ,12) ,4) ) +transpose(((X|X) +echo(X,4,6) ) ,7) ) ,7) ) ,4) ) +transpose((X|step(shuffle(X) ,12) ) ,7) ) ,7) ) ,7) ) +transpose(shuffle(((((((X+transpose((X|X) ,7) ) +transpose(transpose(echo(X,4,6) ,-5) ,12) ) +transpose((((X+transpose(arpeggio(X) ,7) ) +shuffle(X) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(step((X+transpose(X,12) ) ,12) ,12) ) ) ,4) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((step(X,12) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) +transpose(((echo(X,4,6) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,4) ,7) ) ,4) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,7) ) +shuffle((transpose(shuffle((X|X) ) ,-7) +(X+X) ) ) ) +transpose(arpeggio(shuffle(transpose(echo((X|X) ,4,6) ,-5) ) ) ,12) ) ) ,7) ) ) +transpose(step(((transpose((X+transpose(X,12) ) ,-7) |(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) |((step(transpose(transpose(transpose((X+X) ,-5) ,-5) ,-7) ,12) +transpose(shuffle(((X+transpose(X,7) ) +transpose(((X+X) +X) ,7) ) ) ,7) ) +transpose(shuffle(((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(shuffle((X+transpose(X,12) ) ) ,7) ) ) ,12) ) ) ,12) ,12) ) ,7) ) ,-5) +((shuffle((transpose(echo((echo(echo((((shuffle(X) +transpose(((X+transpose(X,12) ) +X) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose(transpose(((X+transpose(X,12) ) +transpose((X+transpose(X,7) ) ,7) ) ,4) ,7) ) ,4,6) ,4,6) +arpeggio((step((X+X) ,12) +transpose(transpose(step((X+transpose(X,7) ) ,12) ,-5) ,7) ) ) ) ,4,6) ,-7) +transpose(step((arpeggio(transpose((step((X|X) ,12) +transpose((echo(transpose(X,-5) ,4,6) +transpose(X,7) ) ,7) ) ,-7) ) +((((transpose((arpeggio(X) +transpose((X+transpose(X,12) ) ,7) ) ,4) +transpose((arpeggio((X|X) ) +X) ,4) ) +transpose(shuffle(arpeggio((shuffle(X) +transpose((X+transpose(X,7) ) ,7) ) ) ) ,7) ) +transpose(arpeggio(shuffle(X) ) ,7) ) +transpose(arpeggio((((((arpeggio(X) +transpose((transpose(X,4) +(X+transpose(X,12) ) ) ,4) ) +transpose((arpeggio(X) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) |step(step(X,12) ,12) ) ) ,7) ) ) ,12) ,7) ) ) +transpose((echo(arpeggio(((transpose((X+transpose(arpeggio(X) ,7) ) ,-7) +transpose(step((X+transpose(X,7) ) ,12) ,4) ) +transpose(((((echo(shuffle(X) ,4,6) +transpose(((X+transpose(echo(step(X,12) ,4,6) ,4) ) +transpose(X,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose(echo(transpose(X,-7) ,4,6) ,4) ) +transpose(((step(echo(X,4,6) ,12) +transpose(shuffle(step(X,12) ) ,4) ) +transpose(echo(shuffle(X) ,4,6) ,7) ) ,7) ) ,7) ) ) ,4,6) +transpose((((step((transpose(X,-5) |((echo(X,4,6) +transpose((transpose(X,4) +transpose(step(X,12) ,7) ) ,4) ) +transpose(step(step(X,12) ,12) ,7) ) ) ,12) +shuffle(transpose(transpose(shuffle(transpose(transpose(X,4) ,-5) ) ,-7) ,-5) ) ) +transpose(transpose((step(arpeggio(transpose(transpose(transpose(X,4) ,4) ,4) ) ,12) |(echo(echo(transpose(transpose(((step(X,12) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ,4) ,4,6) ,4,6) +transpose(transpose((transpose(X,-7) +transpose((step(X,12) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,-5) ,7) ) ) ,4) ,4) ) +transpose(((step(shuffle(echo(arpeggio((X+transpose(X,7) ) ) ,4,6) ) ,12) +transpose(arpeggio(((step(transpose(X,-5) ,12) +transpose(echo(X,4,6) ,4) ) +transpose(echo((X+X) ,4,6) ,7) ) ) ,4) ) +transpose(step((arpeggio(shuffle((arpeggio(X) |step(X,12) ) ) ) |(shuffle((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(transpose((X+transpose(X,7) ) ,-7) ,7) ) ) ,12) ,7) ) ,7) ) ,7) ) ,4) ) +transpose(echo((shuffle(echo((echo((X|(X+transpose(X,7) ) ) ,4,6) +echo(arpeggio(transpose(step(transpose(arpeggio(X) ,-5) ,12) ,4) ) ,4,6) ) ,4,6) ) +transpose(echo((echo(transpose(((transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) +transpose(transpose(X,4) ,4) ) +transpose((transpose(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,-5) +X) ,7) ) ,-5) ,4,6) +transpose(step(X,12) ,7) ) ,4,6) ,7) ) ,4,6) ,7) ) ) ,7) ) ,-7)
random seed used was 0


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