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 20 generations the expression "X" became this:
step(transpose(arpeggio(step((step(transpose(step(echo(((shuffle(arpeggio((X|arpeggio(X) ) ) ) +(transpose(step(transpose(X,4) ,12) ,-7) +transpose(step(transpose(arpeggio(X) ,-5) ,12) ,-5) ) ) +shuffle((((arpeggio(X) |X) +arpeggio(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ) |arpeggio((step(X,12) +(transpose((X|X) ,4) +X) ) ) ) ) ) ,4,6) ,12) ,-7) ,12) +transpose(echo(transpose(arpeggio(step(arpeggio(step(transpose((shuffle(X) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) ,4) ,12) ) ,12) ) ,4) ,4,6) ,7) ) ,12) ) ,-5) ,12)
random seed used was 17539 EXPR = transpose(((transpose((echo(transpose(transpose(transpose(step((transpose(step(X,12) ,4) +transpose(shuffle(echo(X,4,6) ) ,12) ) ,12) ,-7) ,-5) ,-7) ,4,6) +transpose(shuffle(shuffle((step(step(step((echo(step(X,12) ,4,6) +transpose(X,7) ) ,12) ,12) ,12) +transpose(arpeggio((((((step(X,12) |(X|X) ) +X) |arpeggio(step(((X|X) +transpose(arpeggio(step(X,12) ) ,12) ) ,12) ) ) +transpose((echo(X,4,6) +transpose(transpose(X,-5) ,7) ) ,12) ) +((echo(transpose(transpose(transpose(transpose((X|X) ,-7) ,4) ,-7) ,4) ,4,6) +transpose(arpeggio(step(echo(arpeggio(transpose(X,-7) ) ,4,6) ,12) ) ,4) ) +transpose(((transpose(echo(transpose(shuffle(X) ,4) ,4,6) ,-7) +transpose(transpose((echo(X,4,6) +X) ,4) ,4) ) +transpose(echo(step(arpeggio(step((transpose(X,4) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ,12) ,4,6) ,7) ) ,7) ) ) ) ,7) ) ) ) ,12) ) ,-7) |((((transpose(transpose((((transpose(step(step(step(X,12) ,12) ,12) ,4) +transpose(transpose(arpeggio(echo(X,4,6) ) ,-5) ,4) ) +transpose(step(X,12) ,7) ) +echo((arpeggio(transpose(echo((X+X) ,4,6) ,4) ) |shuffle(step(transpose(X,-5) ,12) ) ) ,4,6) ) ,-7) ,-7) +transpose(step(arpeggio(echo(transpose(shuffle(step((transpose(((X|X) +echo(X,4,6) ) ,-5) +transpose((arpeggio(X) +transpose(arpeggio(X) ,7) ) ,12) ) ,12) ) ,4) ,4,6) ) ,12) ,12) ) +transpose(shuffle(shuffle(echo(step(step((X|X) ,12) ,12) ,4,6) ) ) ,7) ) +transpose((transpose(echo(echo(step(echo(transpose(((arpeggio(transpose(echo(X,4,6) ,-5) ) +transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) ,4) ,4,6) ,12) ,4,6) ,4,6) ,-7) +(echo((step(transpose(((X+transpose(step(X,12) ,4) ) +transpose(transpose(X,-7) ,7) ) ,-5) ,12) |arpeggio((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +arpeggio(transpose(transpose((arpeggio(shuffle(X) ) +transpose(transpose(shuffle(X) ,4) ,12) ) ,-7) ,4) ) ) ) ) ,4,6) +((step(step((X+transpose(X,12) ) ,12) ,12) +transpose((transpose(transpose(shuffle(X) ,-5) ,-7) +transpose(arpeggio((transpose(transpose(X,-5) ,4) +transpose(transpose(transpose(X,4) ,-5) ,12) ) ) ,7) ) ,-7) ) +echo(echo(((transpose((transpose(echo(X,4,6) ,4) +transpose(shuffle(X) ,12) ) ,-7) +transpose(transpose(shuffle(echo(X,4,6) ) ,-5) ,7) ) +step(arpeggio(shuffle((X+transpose(X,12) ) ) ) ,12) ) ,4,6) ,4,6) ) ) ) ,4) ) +transpose(step(((transpose(((transpose(arpeggio((echo((transpose(transpose(X,4) ,4) +transpose((((X+transpose(X,4) ) +transpose(shuffle(X) ,7) ) +transpose((transpose(X,-5) +transpose(X,12) ) ,12) ) ,12) ) ,4,6) +((transpose(X,4) +transpose(X,4) ) +transpose((X+X) ,7) ) ) ) ,-5) +transpose((((((transpose(X,4) +transpose((transpose(X,-7) +X) ,12) ) +transpose(((shuffle(X) +transpose(X,7) ) |arpeggio(X) ) ,12) ) +transpose((transpose(((X+transpose(arpeggio(X) ,7) ) +transpose(((X+transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,-5) +transpose((X+transpose(echo(X,4,6) ,7) ) ,12) ) ,7) ) +transpose((echo(echo(X,4,6) ,4,6) |((arpeggio(echo(X,4,6) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) +echo(shuffle(X) ,4,6) ) ) ,4) ) +transpose(shuffle(echo((transpose(transpose(echo(X,4,6) ,-5) ,-7) |((arpeggio(step(transpose(X,-7) ,12) ) +transpose(step(X,12) ,4) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) ) ,4,6) ) ,7) ) ,4) ) +transpose(transpose(echo(((shuffle((X+transpose(X,7) ) ) |transpose(step(transpose(X,4) ,12) ,-5) ) |arpeggio(((step(X,12) +transpose(X,4) ) +transpose(X,7) ) ) ) ,4,6) ,-7) ,7) ) ,-5) +transpose(transpose(step(((arpeggio((((step(X,12) +transpose(echo(X,4,6) ,12) ) +echo(X,4,6) ) |((arpeggio(X) +transpose((X+transpose(X,7) ) ,7) ) +transpose(echo(X,4,6) ,12) ) ) ) +transpose(arpeggio(arpeggio(transpose((transpose(X,4) +transpose(echo(X,4,6) ,12) ) ,-7) ) ) ,4) ) +transpose(transpose(echo(transpose((X|transpose(X,-5) ) ,-5) ,4,6) ,-5) ,7) ) ,12) ,-7) ,12) ) +transpose(arpeggio(echo((arpeggio((echo(X,4,6) +(arpeggio(transpose(X,-5) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ) +transpose(arpeggio(echo(arpeggio(step(X,12) ) ,4,6) ) ,12) ) ,4,6) ) ,12) ) ,12) ,7) ) ) |step(transpose((echo(transpose((step(((((X+transpose(X,4) ) +transpose(X,7) ) |((((shuffle(X) +transpose(echo(X,4,6) ,12) ) +X) +transpose(arpeggio(X) ,4) ) +transpose(transpose(X,4) ,7) ) ) +((transpose(arpeggio((((X+X) +transpose((X|X) ,4) ) +transpose((X+X) ,7) ) ) ,-5) +transpose(((echo(X,4,6) |X) |arpeggio(shuffle(X) ) ) ,4) ) +transpose((shuffle(transpose(X,-5) ) +transpose(((X+(X|X) ) +transpose(arpeggio(X) ,-5) ) ,12) ) ,7) ) ) ,12) |(arpeggio(X) +(arpeggio(echo(step(X,12) ,4,6) ) |step((((X+transpose(X,7) ) +transpose(transpose(X,4) ,7) ) |transpose(X,-5) ) ,12) ) ) ) ,-7) ,4,6) |echo((step(transpose(echo(shuffle((transpose(transpose(((X+X) +transpose(X,12) ) ,4) ,-5) +arpeggio((X+transpose(echo(X,4,6) ,7) ) ) ) ) ,4,6) ,-7) ,12) +transpose(transpose(shuffle(transpose(step(step(transpose(transpose(echo(echo(X,4,6) ,4,6) ,4) ,4) ,12) ,12) ,4) ) ,4) ,12) ) ,4,6) ) ,-5) ,12) ) ,4)
random seed used was 0

NOTE: Generated phrase was too large ( 8439 ) , it has been truncated at 5000 notes. EXPR = step(transpose((step(arpeggio(arpeggio(shuffle(transpose(transpose(transpose(shuffle((arpeggio(X) +transpose(((shuffle(X) |X) +transpose(transpose(X,4) ,4) ) ,7) ) ) ,-7) ,-5) ,4) ) ) ) ,12) +shuffle(step(shuffle((((arpeggio((((((transpose(X,4) +transpose(echo(step(X,12) ,4,6) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +step(arpeggio(X) ,12) ) +transpose(step((X+X) ,12) ,4) ) +transpose((step((step(X,12) |X) ,12) +transpose((X|X) ,7) ) ,7) ) ) +transpose(echo((transpose(X,-7) +(echo((echo(X,4,6) +transpose(echo(X,4,6) ,7) ) ,4,6) +transpose(step(echo(X,4,6) ,12) ,7) ) ) ,4,6) ,12) ) +transpose(((transpose(transpose(arpeggio(shuffle((X+transpose(X,12) ) ) ) ,4) ,4) +transpose((shuffle(X) +transpose(step(step(X,12) ,12) ,7) ) ,7) ) +step(step(transpose(X,4) ,12) ,12) ) ,12) ) +transpose(transpose(step((step(transpose((echo(X,4,6) +arpeggio(X) ) ,4) ,12) +transpose((echo(echo(shuffle((X+X) ) ,4,6) ,4,6) +step(step(X,12) ,12) ) ,7) ) ,12) ,-7) ,7) ) ) ,12) ) ) ,4) ,12)
random seed used was 0 EXPR = (((transpose(step(shuffle((shuffle((echo(((step(echo(X,4,6) ,12) +transpose(transpose(step(X,12) ,4) ,4) ) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) ,4,6) |echo(arpeggio(echo(shuffle(step(transpose(X,4) ,12) ) ,4,6) ) ,4,6) ) ) |echo((transpose(shuffle(arpeggio(echo(transpose(shuffle((arpeggio(X) |step(X,12) ) ) ,-5) ,4,6) ) ) ,-5) +transpose((((arpeggio(transpose(shuffle(X) ,-7) ) |arpeggio(((transpose(echo(X,4,6) ,4) +transpose((step(step(X,12) ,12) +step((X+transpose(X,12) ) ,12) ) ,4) ) +transpose(transpose((X+X) ,-5) ,7) ) ) ) |step((echo(echo(shuffle(X) ,4,6) ,4,6) |(X+transpose(X,12) ) ) ,12) ) |step((((shuffle(step(step(X,12) ,12) ) +transpose(((X+transpose(X,-7) ) +echo((X+X) ,4,6) ) ,4) ) +transpose((transpose(shuffle(X) ,4) +shuffle((shuffle(X) +transpose(echo(X,4,6) ,7) ) ) ) ,4) ) +transpose(echo((((X+X) +transpose(step(X,12) ,4) ) +transpose(((X|X) +X) ,7) ) ,4,6) ,7) ) ,12) ) ,12) ) ,4,6) ) ) ,12) ,-5) +transpose(((arpeggio(echo((transpose(echo(step(transpose((echo(X,4,6) |arpeggio(X) ) ,-7) ,12) ,4,6) ,-5) +(((((X+transpose(X,12) ) +X) +((arpeggio((X+X) ) +X) +((echo(X,4,6) |transpose(X,-5) ) +step(step(X,12) ,12) ) ) ) |transpose(transpose(transpose((X+transpose(shuffle((X|X) ) ,12) ) ,-7) ,4) ,4) ) +transpose(transpose((((X+X) +shuffle(echo(X,4,6) ) ) |transpose((transpose((X+transpose(X,12) ) ,-5) +(transpose(shuffle(X) ,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,-5) ) ,4) ,12) ) ) ,4,6) ) +transpose(shuffle(step(arpeggio(transpose(transpose(step((transpose(transpose(X,-7) ,4) +transpose(((shuffle(X) +transpose(transpose(X,-5) ,12) ) +transpose(transpose(arpeggio(X) ,-5) ,7) ) ,12) ) ,12) ,-7) ,4) ) ,12) ) ,4) ) +transpose((echo(transpose(shuffle(step(echo(step(arpeggio((X+(X+transpose(X,7) ) ) ) ,12) ,4,6) ,12) ) ,-5) ,4,6) |echo((echo(shuffle((transpose(echo(shuffle(echo(transpose(transpose(arpeggio(X) ,-5) ,-7) ,4,6) ) ,4,6) ,-7) +transpose(shuffle(transpose((arpeggio((X+transpose(X,12) ) ) +transpose(echo(X,4,6) ,7) ) ,-7) ) ,7) ) ) ,4,6) |transpose(step(echo(transpose(echo((transpose(step(transpose(X,4) ,12) ,-5) +transpose(shuffle(shuffle(X) ) ,12) ) ,4,6) ,-5) ,4,6) ,12) ,4) ) ,4,6) ) ,7) ) ,-7) ) +transpose(transpose((((transpose(step(transpose((((echo(shuffle(transpose(echo((X+transpose(X,7) ) ,4,6) ,4) ) ,4,6) +echo((step(echo(arpeggio((transpose(X,-7) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,4,6) ,12) +transpose(step(transpose(shuffle(arpeggio((X+step(X,12) ) ) ) ,-7) ,12) ,7) ) ,4,6) ) +transpose(((((transpose(transpose(transpose(X,4) ,-7) ,4) +transpose(transpose(transpose(X,4) ,-5) ,4) ) +transpose(((transpose(X,4) +transpose(echo(X,4,6) ,12) ) +transpose(step(X,12) ,4) ) ,7) ) +transpose(arpeggio((X|step(X,12) ) ) ,12) ) +transpose(echo(transpose(transpose(((step(X,12) +transpose((transpose(X,4) +echo(X,4,6) ) ,12) ) +transpose(step((((X+transpose(X,12) ) +transpose(echo(X,4,6) ,7) ) +(echo(X,4,6) |echo(X,4,6) ) ) ,12) ,7) ) ,-5) ,-5) ,4,6) ,12) ) ,4) ) +transpose(step(step(step(echo(X,4,6) ,12) ,12) ,12) ,7) ) ,4) ,12) ,-7) +transpose(transpose(shuffle(shuffle(step(arpeggio(arpeggio((echo((arpeggio(transpose((X+X) ,-7) ) +transpose(transpose((transpose(X,4) +transpose(transpose(X,-5) ,7) ) ,-7) ,12) ) ,4,6) +step(echo((((echo(X,4,6) |X) +transpose((X|X) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) |echo(X,4,6) ) ,7) ) ,4,6) ,12) ) ) ) ,12) ) ) ,-7) ,4) ) +transpose((((((arpeggio(shuffle((echo(step(X,12) ,4,6) +transpose(transpose(((((X+X) +transpose(X,4) ) +transpose((X+X) ,7) ) +transpose((X+transpose(X,12) ) ,12) ) ,4) ,12) ) ) ) +echo(step(arpeggio(step(transpose((X+((X+X) +(X|X) ) ) ,4) ,12) ) ,12) ,4,6) ) +transpose(transpose(step(((((transpose(X,4) +transpose(arpeggio(transpose((X+transpose(X,12) ) ,-7) ) ,4) ) +transpose((transpose(X,-5) +step(arpeggio(shuffle(X) ) ,12) ) ,7) ) |transpose(shuffle(step(step(arpeggio(echo(X,4,6) ) ,12) ,12) ) ,-5) ) |transpose(echo(transpose(step(transpose(arpeggio(transpose(X,-7) ) ,-5) ,12) ,4) ,4,6) ,-7) ) ,12) ,-5) ,12) ) +transpose((arpeggio(shuffle(transpose(transpose(shuffle(transpose(arpeggio(step(transpose(((X+transpose(X,12) ) |(X+transpose(X,12) ) ) ,4) ,12) ) ,-7) ) ,-5) ,-7) ) ) +transpose((step(step(((shuffle(transpose(X,4) ) |shuffle(arpeggio((step(X,12) |echo(X,4,6) ) ) ) ) +transpose(step(arpeggio(step(X,12) ) ,12) ,7) ) ,12) ,12) |arpeggio((echo(arpeggio(shuffle((shuffle(X) +transpose(transpose(step(X,12) ,4) ,12) ) ) ) ,4,6) |step(transpose(step(arpeggio(transpose(X,-5) ) ,12) ,4) ,12) ) ) ) ,12) ) ,4) ) +transpose(transpose(shuffle(arpeggio(step(((arpeggio(echo(arpeggio(echo(X,4,6) ) ,4,6) ) +step((step(arpeggio(X) ,12) +transpose(arpeggio(X) ,12) ) ,12) ) |((((X+transpose((echo(X,4,6) +transpose(echo(X,4,6) ,12) ) ,12) ) +arpeggio(step(transpose(arpeggio(X) ,-5) ,12) ) ) +transpose(echo((X|(X+X) ) ,4,6) ,4) ) +transpose(step(step(((shuffle(X) +transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) ,12) ,12) ,7) ) ) ,12) ) ) ,-5) ,7) ) +transpose((((shuffle((transpose(transpose((echo(X,4,6) +((arpeggio(X) +transpose(X,4) ) +transpose(X,7) ) ) ,-7) ,-5) +step(transpose(arpeggio(transpose(transpose(step(X,12) ,-7) ,4) ) ,-5) ,12) ) ) |transpose(echo(shuffle((transpose(shuffle(((shuffle(X) |(X+transpose(X,7) ) ) +transpose((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ) ,-7) |transpose(step(step(transpose(X,4) ,12) ,12) ,4) ) ) ,4,6) ,-5) ) +transpose(echo(arpeggio((X+transpose((transpose(transpose(echo(X,4,6) ,-7) ,-7) +transpose(shuffle((step(shuffle(X) ,12) |(X+transpose(X,12) ) ) ) ,12) ) ,12) ) ) ,4,6) ,-5) ) |step(step(transpose(transpose(shuffle((arpeggio(echo(X,4,6) ) +transpose(X,-5) ) ) ,-5) ,-7) ,12) ,12) ) ,7) ) ,7) ) |step(transpose(transpose((echo(((echo((((transpose(X,-5) +arpeggio((shuffle(X) +transpose(step(X,12) ,7) ) ) ) +transpose(step((transpose(X,4) +transpose(echo(X,4,6) ,7) ) ,12) ,12) ) +transpose(echo(step(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ,4,6) ,12) ) ,4,6) +transpose((transpose(shuffle((echo(step(X,12) ,4,6) |(step(X,12) +shuffle(X) ) ) ) ,4) +transpose((transpose(shuffle(((transpose((X+X) ,-5) +transpose(X,12) ) +transpose(((X+transpose(X,12) ) +arpeggio(X) ) ,7) ) ) ,-5) |transpose(transpose(transpose(transpose(transpose(X,-5) ,4) ,-5) ,-5) ,-5) ) ,7) ) ,4) ) +transpose(((((X+X) +transpose(transpose(echo(echo(X,4,6) ,4,6) ,-7) ,4) ) +transpose(shuffle(transpose(X,4) ) ,7) ) +(shuffle(X) |step(transpose((X+transpose(X,12) ) ,4) ,12) ) ) ,7) ) ,4,6) +arpeggio(shuffle(shuffle(transpose(echo(arpeggio(((X|(X+transpose(X,12) ) ) +X) ) ,4,6) ,-5) ) ) ) ) ,4) ,-7) ,12) ) ,4) ,4) ) +transpose(((transpose(transpose(step((((echo(arpeggio(((echo(X,4,6) +arpeggio(X) ) +arpeggio(transpose(X,-7) ) ) ) ,4,6) +transpose(((step(X,12) |step(X,12) ) +transpose(step(arpeggio(X) ,12) ,7) ) ,4) ) +transpose(shuffle(step((shuffle(transpose(X,-7) ) +(X+transpose(transpose(X,-7) ,12) ) ) ,12) ) ,7) ) +echo(transpose(((arpeggio(X) +transpose(shuffle(arpeggio(X) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,-5) ,4,6) ) ,12) ,-5) ,4) +(shuffle((transpose((echo(arpeggio((transpose(X,4) |echo(echo(X,4,6) ,4,6) ) ) ,4,6) |((step(transpose((X+transpose(X,7) ) ,4) ,12) +transpose(transpose((((X|X) +transpose(shuffle(X) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,-7) ,4) ) +transpose(shuffle(X) ,7) ) ) ,-7) |step(step(shuffle(echo(shuffle(transpose(X,4) ) ,4,6) ) ,12) ,12) ) ) +transpose(transpose(step(((transpose((shuffle(arpeggio(X) ) +transpose((transpose(X,-7) +transpose(((X+transpose(X,12) ) +X) ,7) ) ,7) ) ,-5) +transpose((arpeggio(X) |arpeggio(arpeggio((((X+X) +X) |transpose(transpose(X,-7) ,-7) ) ) ) ) ,4) ) +transpose(step(echo(transpose(echo(X,4,6) ,-5) ,4,6) ,12) ,7) ) ,12) ,-5) ,7) ) ) |transpose(((shuffle(transpose(shuffle((arpeggio(X) +(X|step(X,12) ) ) ) ,-5) ) +(arpeggio((((transpose(transpose(step(echo(step(arpeggio((X+X) ) ,12) ,4,6) ,12) ,-5) ,-5) +transpose(transpose(shuffle(transpose(echo(transpose(X,-7) ,4,6) ,-5) ) ,-7) ,12) ) +transpose(((transpose(transpose(shuffle(((X|(X+transpose(X,7) ) ) +transpose(arpeggio(X) ,-5) ) ) ,-5) ,-7) +transpose((shuffle(echo(transpose(shuffle(transpose(X,-7) ) ,4) ,4,6) ) +transpose(step(arpeggio(step(((shuffle(shuffle(X) ) |step(transpose(X,-7) ,12) ) +transpose((arpeggio(shuffle(X) ) +transpose(X,7) ) ,12) ) ,12) ) ,12) ,7) ) ,4) ) +transpose(shuffle(arpeggio((((X+transpose(X,7) ) +transpose((arpeggio(X) +transpose(X,7) ) ,12) ) +transpose((echo(arpeggio(X) ,4,6) +transpose((X+X) ,4) ) ,12) ) ) ) ,7) ) ,4) ) +transpose((transpose(step((X|(X|X) ) ,12) ,-7) +transpose(transpose((transpose((shuffle(transpose(X,-5) ) +transpose(transpose(echo(step(transpose(X,-7) ,12) ,4,6) ,-7) ,7) ) ,-7) +transpose(transpose(echo(((echo(arpeggio(X) ,4,6) +transpose(X,12) ) +transpose(transpose((shuffle(X) |(X+transpose(X,12) ) ) ,-7) ,12) ) ,4,6) ,4) ,12) ) ,-7) ,7) ) ,7) ) ) +transpose(transpose(((step(((arpeggio(X) +transpose(transpose(echo(step(transpose(X,-7) ,12) ,4,6) ,4) ,12) ) +transpose(shuffle(step((arpeggio(X) |echo(X,4,6) ) ,12) ) ,7) ) ,12) +((arpeggio((arpeggio(((X|X) |(X+transpose(X,7) ) ) ) |((echo(echo(step(X,12) ,4,6) ,4,6) |(X+transpose(X,7) ) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) +transpose((transpose(X,-7) +transpose(X,-5) ) ,12) ) ,7) ) ) ) +transpose(((transpose((X+X) ,-7) +transpose(arpeggio(X) ,12) ) +transpose(arpeggio(transpose(arpeggio(X) ,4) ) ,12) ) ,4) ) +transpose(shuffle(shuffle((X+transpose(X,4) ) ) ) ,7) ) ) +transpose(((echo(arpeggio(shuffle(transpose(transpose((arpeggio(X) +transpose(X,4) ) ,4) ,-5) ) ) ,4,6) |step(arpeggio(echo(echo((X|X) ,4,6) ,4,6) ) ,12) ) |(((((transpose(arpeggio(shuffle(X) ) ,4) +transpose((arpeggio(transpose(X,-7) ) |step((transpose(transpose(X,-5) ,-7) |(transpose(X,-7) +shuffle(X) ) ) ,12) ) ,12) ) +transpose(step(step(transpose(transpose((arpeggio(X) +(X+X) ) ,4) ,4) ,12) ,12) ,4) ) +transpose((((shuffle(transpose(X,-5) ) +transpose(arpeggio(step(X,12) ) ,12) ) |step(echo(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4,6) ,12) ) +transpose(echo(X,4,6) ,12) ) ,7) ) +transpose(((arpeggio(transpose((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(shuffle(X) ,4) ) ,4) ) |transpose(((transpose(echo(shuffle(X) ,4,6) ,-7) +transpose(transpose(X,4) ,4) ) +transpose((X|X) ,7) ) ,4) ) +shuffle(transpose(echo((X+X) ,4,6) ,-7) ) ) ,4) ) +transpose(transpose(((shuffle(step(arpeggio(transpose(X,-7) ) ,12) ) +transpose(arpeggio(((transpose(step(X,12) ,4) +transpose((echo(X,4,6) +X) ,12) ) |step((echo(X,4,6) |X) ,12) ) ) ,4) ) +transpose(((arpeggio(echo(transpose(X,4) ,4,6) ) +transpose(step(transpose(step(echo(X,4,6) ,12) ,4) ,12) ,4) ) +transpose(((transpose(X,4) +transpose(X,4) ) +transpose(((X+transpose(X,7) ) |transpose(X,4) ) ,7) ) ,7) ) ,7) ) ,-5) ,7) ) ) ,7) ) ,-7) ,7) ) ) +transpose(arpeggio(transpose(((shuffle(transpose((transpose(X,4) |X) ,-5) ) +transpose(arpeggio(echo(arpeggio(step(X,12) ) ,4,6) ) ,7) ) |(shuffle((step(arpeggio(X) ,12) +transpose(transpose((step(X,12) +X) ,-7) ,7) ) ) +transpose(step((((echo(X,4,6) +transpose(X,4) ) +transpose((X+X) ,7) ) |(X+transpose(X,7) ) ) ,12) ,12) ) ) ,4) ) ,12) ) ,-5) ) ,7) )
random seed used was 0

NOTE: Generated phrase was too large ( 12738 ) , it has been truncated at 5000 notes.


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