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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After 20 generations the expression "X" became this:
(transpose(transpose((shuffle((((transpose(transpose((transpose(echo((X+transpose((X+X) ,7) ) ,4,6) ,-7) +transpose(shuffle(arpeggio(step(X,12) ) ) ,12) ) ,-5) ,-5) |transpose(transpose(echo(((X+transpose(transpose(step((X+X) ,12) ,-7) ,4) ) +transpose(((transpose((X+X) ,-7) |step(shuffle(X) ,12) ) |(transpose(X,-5) +(transpose(X,-5) +(X|X) ) ) ) ,7) ) ,4,6) ,-5) ,4) ) +transpose((((transpose((((((X+transpose(X,7) ) |transpose(transpose(X,-7) ,-5) ) +transpose((step(X,12) +transpose(X,12) ) ,7) ) +transpose((X+X) ,4) ) +transpose((step(X,12) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,-7) +transpose(transpose(echo(transpose((X+X) ,4) ,4,6) ,-7) ,12) ) +transpose(transpose(arpeggio((step(X,12) +transpose((step((X|X) ,12) +transpose(X,-5) ) ,12) ) ) ,-5) ,4) ) +transpose(echo(echo((echo(shuffle(X) ,4,6) |(echo(X,4,6) +transpose(shuffle(X) ,12) ) ) ,4,6) ,4,6) ,7) ) ,4) ) +transpose(((step((step(X,12) +((X|X) +step(X,12) ) ) ,12) +transpose(arpeggio(transpose(((step(X,12) +transpose((X|step(X,12) ) ,7) ) |(transpose(arpeggio(X) ,4) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) ) ,-5) ) ,7) ) +(step(transpose(transpose(shuffle(transpose(X,4) ) ,-5) ,4) ,12) +transpose((((arpeggio(X) +transpose(transpose(((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,4) ) +transpose(((X|X) +transpose((X+X) ,12) ) ,12) ) ,-5) ,4) ) +transpose((X|transpose(X,-5) ) ,7) ) +transpose(shuffle(echo(transpose(X,4) ,4,6) ) ,12) ) ,7) ) ) ,7) ) ) |transpose(arpeggio(arpeggio((((shuffle((((X+transpose(arpeggio(transpose(X,4) ) ,7) ) +transpose(X,-5) ) +transpose(transpose((shuffle(X) +transpose(X,12) ) ,-5) ,12) ) ) +(transpose((transpose(X,-7) |X) ,4) +transpose((X+(((X|X) +transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ) +((arpeggio(((shuffle((X+transpose(X,7) ) ) +transpose(shuffle(X) ,4) ) +transpose(arpeggio((X+step(X,12) ) ) ,7) ) ) |transpose(step((transpose(X,-7) |X) ,12) ,-7) ) |echo(transpose((transpose(step(step(transpose(X,-7) ,12) ,12) ,-7) +transpose(transpose(arpeggio(((X|X) |((X|X) +transpose((X+transpose(X,12) ) ,7) ) ) ) ,-5) ,12) ) ,4) ,4,6) ) ) |transpose(transpose((((((step(X,12) +transpose((X+transpose(X,7) ) ,4) ) +transpose(shuffle(X) ,7) ) +transpose(((X+X) +X) ,7) ) +(arpeggio(X) +transpose((X+transpose((X|X) ,12) ) ,12) ) ) +transpose((transpose((step((echo(X,4,6) |step(X,12) ) ,12) +(echo(X,4,6) +arpeggio(X) ) ) ,-7) +transpose(echo(step(((X|X) +transpose(X,12) ) ,12) ,4,6) ,7) ) ,7) ) ,-5) ,4) ) ) ) ,-5) ) ,4) ,4) +transpose((arpeggio(transpose((((shuffle(echo(transpose(X,4) ,4,6) ) |echo((step((X+transpose(X,7) ) ,12) +transpose((X|transpose(X,-5) ) ,12) ) ,4,6) ) +transpose((((shuffle((X|(X|X) ) ) |transpose((X|X) ,4) ) |step(transpose(X,-7) ,12) ) |arpeggio(transpose(X,-7) ) ) ,7) ) +arpeggio(echo(echo(((transpose((X+X) ,-7) +transpose(arpeggio(X) ,4) ) +transpose(X,-5) ) ,4,6) ,4,6) ) ) ,-5) ) +transpose(((transpose(arpeggio(transpose(((transpose((((echo(transpose((transpose((X|(X+X) ) ,-7) +((X|transpose(X,-5) ) |shuffle(transpose(X,-7) ) ) ) ,-5) ,4,6) +transpose(((arpeggio(transpose(X,-7) ) +transpose(((transpose((X+transpose(X,12) ) ,4) +transpose(((X+X) |X) ,12) ) +transpose(step((X+transpose(X,12) ) ,12) ,7) ) ,7) ) +(transpose(transpose(X,4) ,4) +arpeggio(shuffle(transpose(X,-7) ) ) ) ) ,12) ) +transpose(transpose(((step(((X+transpose((X|X) ,12) ) +transpose(transpose(X,4) ,7) ) ,12) +transpose(step(((step((X|X) ,12) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) +transpose(transpose(transpose(X,-7) ,-7) ,12) ) ,12) ,12) ) |(((((X+transpose((X+X) ,4) ) +transpose(transpose(X,4) ,7) ) |(arpeggio(X) +transpose(X,-5) ) ) +((arpeggio(X) +transpose(step((X|X) ,12) ,4) ) +transpose(transpose(X,-7) ,7) ) ) +transpose(shuffle(((X+transpose(X,12) ) +transpose(X,12) ) ) ,-7) ) ) ,4) ,4) ) +transpose(((transpose(transpose(X,-7) ,4) +transpose((shuffle((X|X) ) |step((shuffle(X) +step(X,12) ) ,12) ) ,7) ) +(((transpose(X,-7) +transpose((X+X) ,7) ) +step(X,12) ) |(shuffle(transpose(X,4) ) +transpose(X,12) ) ) ) ,7) ) ,4) +transpose(step(transpose((transpose((((X+transpose(X,12) ) +(X+transpose((X+transpose(X,7) ) ,12) ) ) |shuffle(X) ) ,-5) |(((X+X) +transpose(transpose(X,-7) ,12) ) |(transpose((X+X) ,4) +transpose(echo(X,4,6) ,7) ) ) ) ,-5) ,12) ,4) ) +transpose(transpose((((((arpeggio(X) +transpose(((X+X) |shuffle(X) ) ,-5) ) +transpose(arpeggio((transpose(X,4) +transpose(transpose(X,-5) ,7) ) ) ,7) ) +transpose(((((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) |X) +transpose(((X|(X|X) ) +transpose(((X+X) |arpeggio(X) ) ,7) ) ,4) ) +transpose(echo((X+transpose(transpose(X,4) ,12) ) ,4,6) ,7) ) +transpose(transpose(transpose(transpose(((arpeggio(X) +X) +(transpose(X,-7) +transpose((X+X) ,12) ) ) ,4) ,-5) ,-7) ,12) ) ,4) ) +transpose(transpose(((((((step((X+transpose(X,7) ) ,12) +transpose(X,4) ) +transpose((X+transpose((transpose(X,-5) +transpose((X+X) ,7) ) ,7) ) ,4) ) +transpose(step(transpose(shuffle(X) ,-7) ,12) ,7) ) |(arpeggio((transpose(X,-5) +transpose(transpose(X,-5) ,12) ) ) |transpose((X+transpose(X,7) ) ,-7) ) ) +transpose((((transpose(arpeggio(X) ,-5) |(X+transpose((X+X) ,12) ) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) ) +transpose(arpeggio((step(X,12) +transpose((((X+X) +transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ,7) ) ,4) ) +transpose(transpose(arpeggio(transpose((X+X) ,-5) ) ,-7) ,7) ) ,-7) ,7) ) |((transpose(shuffle((transpose(transpose(X,-5) ,4) |((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,-7) |(arpeggio(transpose((X+transpose(X,7) ) ,-7) ) +echo(transpose(X,-7) ,4,6) ) ) +transpose(((arpeggio(echo(step((X+transpose((((X+transpose(X,4) ) +transpose(X,7) ) |(X|X) ) ,12) ) ,12) ,4,6) ) +transpose(((X|X) +transpose((shuffle(X) +(X+transpose(X,7) ) ) ,7) ) ,4) ) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) ,12) ) ) ,-7) ,7) ) ,-7) ) ,-5) +arpeggio((transpose((step(transpose(transpose((echo(X,4,6) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,-5) ,4) ,12) +transpose(echo(transpose(echo(transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(((transpose(transpose(X,4) ,4) +transpose(transpose(X,-5) ,7) ) |((transpose(X,4) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ) ,12) ) ,4) ,4,6) ,4) ,4,6) ,7) ) ,4) |(arpeggio(transpose((echo(transpose(((echo(shuffle(X) ,4,6) +transpose(X,-5) ) +echo(echo(shuffle(X) ,4,6) ,4,6) ) ,-7) ,4,6) +shuffle((transpose(step(X,12) ,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ) ,4) ) |transpose(((((X|(X+transpose(X,7) ) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) ) +transpose(((X+shuffle(arpeggio(X) ) ) |transpose(transpose(transpose(arpeggio(X) ,-5) ,4) ,-5) ) ,7) ) |transpose(echo(transpose(X,-5) ,4,6) ,-5) ) ,4) ) ) ) ) |shuffle(step((((((((((X+transpose(X,-5) ) |(transpose(X,-7) |transpose(X,-7) ) ) |shuffle(X) ) +transpose((transpose((transpose(X,4) +transpose(X,7) ) ,-5) +transpose((shuffle(X) +transpose(X,-7) ) ,-7) ) ,4) ) +transpose(transpose(X,4) ,7) ) +(((X|(X+transpose(X,7) ) ) +transpose(echo(echo(transpose(X,-5) ,4,6) ,4,6) ,4) ) +transpose((((((X+transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) +((X+transpose(X,7) ) +transpose(X,-5) ) ) +transpose((((transpose((X+X) ,-5) +(X|X) ) +transpose((transpose(X,-7) +X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ) +transpose(transpose(((X+X) +transpose(transpose((X+transpose(X,12) ) ,-5) ,7) ) ,-7) ,7) ) ,7) ) ) |echo((echo(transpose(step(X,12) ,4) ,4,6) +transpose((step((X|shuffle(transpose(X,-7) ) ) ,12) +transpose(echo(arpeggio(transpose(step(X,12) ,4) ) ,4,6) ,12) ) ,12) ) ,4,6) ) +transpose((transpose(transpose(echo(transpose((transpose(X,4) +transpose(arpeggio((X+transpose(X,12) ) ) ,7) ) ,-5) ,4,6) ,4) ,4) +transpose(((transpose(step(((X+X) |shuffle(X) ) ,12) ,-5) +transpose(((transpose(transpose(transpose(arpeggio(transpose(X,-7) ) ,-7) ,4) ,4) +transpose(transpose(shuffle((transpose(transpose(X,-5) ,4) |(echo(X,4,6) +(((X|X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ) ) ,-5) ,4) ) +transpose(step(echo(transpose(X,-5) ,4,6) ,12) ,7) ) ,12) ) |transpose(transpose(((echo(transpose(X,4) ,4,6) +transpose(transpose(X,4) ,12) ) +transpose(transpose(transpose((X+(X+X) ) ,-5) ,-7) ,12) ) ,4) ,-7) ) ,7) ) ,12) ) |(transpose(transpose((arpeggio(transpose((((transpose(shuffle(transpose((X+X) ,4) ) ,4) +transpose(step(((X+transpose(X,12) ) |X) ,12) ,7) ) +shuffle(step(X,12) ) ) +transpose(shuffle(((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) |step(transpose(X,4) ,12) ) |transpose(arpeggio(X) ,4) ) ) ,7) ) ,4) ) +transpose((echo(transpose(X,-7) ,4,6) +transpose(transpose(echo(((transpose(X,-7) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,7) ) +(shuffle(arpeggio(X) ) +transpose((X+X) ,4) ) ) ,4,6) ,-5) ,7) ) ,-5) ) ,-5) ,4) |step((((step((shuffle((X|X) ) +transpose((X|X) ,-7) ) ,12) +transpose(((transpose(step((X|transpose(X,4) ) ,12) ,-7) +transpose((X|X) ,4) ) +transpose(((transpose(X,-7) +transpose((X+transpose(X,7) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,7) ) +transpose((transpose(echo(((X+transpose(X,7) ) +transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,7) ) ,4,6) ,4) |echo(((transpose(X,-7) |X) +echo((X+X) ,4,6) ) ,4,6) ) ,7) ) +transpose(echo(((((step(((arpeggio(X) +(X+transpose(X,7) ) ) +transpose((shuffle(X) +X) ,12) ) ,12) +transpose(shuffle(((step(X,12) +transpose(shuffle(X) ,4) ) +transpose((X|(X+X) ) ,7) ) ) ,7) ) |(transpose((X+transpose(X,7) ) ,-7) +arpeggio(transpose(X,-5) ) ) ) +transpose(transpose((shuffle(X) +transpose(X,12) ) ,4) ,12) ) +transpose((transpose(transpose(transpose((X+X) ,-5) ,-7) ,-5) +transpose(((transpose(X,-5) |echo(X,4,6) ) +transpose((transpose(X,4) +X) ,7) ) ,-7) ) ,7) ) ,4,6) ,12) ) ,12) ) ) ,12) ) ) ,7) ) ,12) )
random seed used was 177436589

NOTE: Generated phrase was too large ( 7720 ) , it has been truncated at 5000 notes. EXPR = (echo(step((((echo(transpose(arpeggio(transpose(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(echo(X,4,6) ,4) ) +transpose((X+X) ,7) ) ,-5) ) ,-5) ,4,6) +(transpose(((((transpose(transpose(X,4) ,-7) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,7) ) |echo(echo((X+X) ,4,6) ,4,6) ) +transpose(step(X,12) ,4) ) |transpose(((shuffle(X) +transpose(transpose((transpose(X,-7) +transpose(step((X+transpose(X,12) ) ,12) ,12) ) ,-7) ,7) ) +transpose(((transpose(((X+transpose(X,7) ) +transpose(transpose(X,-5) ,7) ) ,-5) +transpose(echo((X+X) ,4,6) ,4) ) +transpose(transpose(transpose(step((X+X) ,12) ,-5) ,4) ,7) ) ,12) ) ,-7) ) ,-7) +echo((transpose(transpose(echo((((echo(X,4,6) +transpose(X,12) ) +transpose(X,7) ) +transpose(step(transpose(X,-7) ,12) ,7) ) ,4,6) ,4) ,4) |(shuffle((transpose(X,-5) +transpose(transpose(X,-7) ,12) ) ) |(((X+transpose((transpose(X,-7) |(X+transpose(X,7) ) ) ,12) ) +(step(shuffle((X+X) ) ,12) +arpeggio(X) ) ) +(((((X+transpose((X+transpose(X,7) ) ,4) ) +transpose(echo((X|X) ,4,6) ,7) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) +transpose(transpose(transpose(X,-7) ,-7) ,4) ) +transpose((((X|step(X,12) ) +transpose((X|X) ,12) ) |((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ,7) ) ) ) ) ,4,6) ) ) +((transpose(transpose(transpose(transpose(shuffle(transpose(transpose(X,-7) ,-5) ) ,-7) ,-5) ,-7) ,-7) +transpose(transpose(arpeggio((echo(transpose(echo(((X+transpose(X,7) ) |X) ,4,6) ,4) ,4,6) +transpose(transpose((arpeggio(step((X+transpose((X|X) ,12) ) ,12) ) +transpose((transpose((X+transpose(X,-7) ) ,-5) +transpose(step(X,12) ,7) ) ,4) ) ,-5) ,7) ) ) ,-5) ,12) ) +transpose(((transpose((transpose(echo((echo((echo(X,4,6) +transpose(echo(X,4,6) ,12) ) ,4,6) +transpose(X,4) ) ,4,6) ,-7) +arpeggio(transpose((transpose(transpose(X,-5) ,-5) +transpose(transpose((X|X) ,-5) ,12) ) ,-7) ) ) ,-5) +transpose((((echo((transpose((transpose(X,-7) +transpose(X,7) ) ,-7) |transpose(transpose(echo(arpeggio(X) ,4,6) ,4) ,-7) ) ,4,6) +transpose(transpose(transpose(X,-7) ,-7) ,7) ) +transpose(transpose(shuffle(((((transpose(arpeggio(X) ,-5) |transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(echo((transpose((X+(X+transpose(X,12) ) ) ,4) +transpose(transpose(X,4) ,7) ) ,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ,-7) ,4) ) +transpose(transpose(transpose(transpose(transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,4) ) ,4) ,4) ,-5) ,-5) ,7) ) ,4) ) +transpose(step(((((((transpose(transpose(X,-5) ,-7) |echo(arpeggio(transpose((X|X) ,4) ) ,4,6) ) +((shuffle(X) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(transpose(X,-5) ,7) ) ) +step(transpose(X,-5) ,12) ) +transpose(((((transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +echo(X,4,6) ) ,-5) +transpose(transpose(step((X+X) ,12) ,4) ,4) ) +transpose(arpeggio((((X+transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ,7) ) +((transpose(arpeggio(transpose(X,-5) ) ,-7) +transpose(transpose((((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +((transpose(X,4) +transpose(echo(X,4,6) ,4) ) +transpose(X,7) ) ) ,-7) ,4) ) +transpose((shuffle(transpose(X,-5) ) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) ) +transpose(transpose(step((X|shuffle(X) ) ,12) ,-5) ,12) ) ,4) ) +transpose(((transpose(transpose((echo(X,4,6) +((X+X) +transpose(transpose(X,-5) ,7) ) ) ,4) ,4) +transpose(shuffle(((echo(X,4,6) +(X+X) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,12) ) ) ,12) ) |(transpose(X,-7) +((transpose((X+transpose(X,7) ) ,-5) +transpose(transpose((X+X) ,4) ,7) ) +transpose((X+transpose(transpose((X+transpose(X,12) ) ,-7) ,7) ) ,7) ) ) ) ,7) ) +step(((X+transpose((transpose(X,-5) |(X+X) ) ,4) ) +transpose(((step(X,12) +transpose(shuffle(X) ,4) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ,12) ) ,12) ,7) ) ,12) ) ) +transpose((transpose((transpose(echo(transpose(X,-7) ,4,6) ,-7) +transpose(step((echo(X,4,6) |transpose(((X+transpose((X+X) ,4) ) +transpose(X,7) ) ,4) ) ,12) ,-7) ) ,4) +transpose(transpose(((shuffle(transpose(X,4) ) |(((transpose(X,-5) +transpose(step(transpose(X,4) ,12) ,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,12) ) ) +transpose(transpose(shuffle(transpose(transpose(X,4) ,-7) ) ,-7) ,12) ) ,-5) ,-7) ) ,12) ) ,12) ,4,6) +transpose(((((transpose(((transpose(transpose(transpose(shuffle(X) ,-7) ,4) ,4) +transpose(arpeggio(((X+X) |(((X|X) +X) |shuffle(transpose(X,-7) ) ) ) ) ,-5) ) +echo(((shuffle(step(arpeggio(transpose((X+X) ,-5) ) ,12) ) +transpose((arpeggio(transpose(arpeggio(X) ,4) ) +step(transpose(arpeggio((X+(X+X) ) ) ,-7) ,12) ) ,4) ) +transpose(arpeggio(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ,7) ) ,4,6) ) ,-5) +transpose((((step(arpeggio(transpose(((arpeggio(((echo(X,4,6) +transpose(transpose(X,-7) ,7) ) +step(X,12) ) ) +echo(transpose((X+(X+transpose(X,7) ) ) ,4) ,4,6) ) +step((((X|shuffle(X) ) +transpose(transpose(transpose(step(X,12) ,4) ,4) ,4) ) +transpose((X+(X+transpose(X,12) ) ) ,7) ) ,12) ) ,4) ) ,12) +transpose((transpose(shuffle((echo((transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) +transpose(transpose(((X+X) |transpose(X,4) ) ,-7) ,12) ) ,4,6) +transpose(transpose(transpose((((transpose(X,-7) |(X|X) ) +transpose(X,4) ) +transpose(X,7) ) ,-5) ,-7) ,7) ) ) ,4) +((transpose(((shuffle(arpeggio(X) ) +transpose((X+(X+(X+X) ) ) ,4) ) +transpose(transpose(echo(X,4,6) ,4) ,7) ) ,-7) +transpose((((echo(shuffle(X) ,4,6) +transpose((step(((X+X) +(X+X) ) ,12) +transpose(((X|X) +transpose((X+X) ,7) ) ,12) ) ,4) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) +(transpose(transpose(echo(transpose(X,4) ,4,6) ,4) ,-7) +echo((((X+transpose(X,12) ) +transpose(transpose(X,4) ,12) ) +transpose((X|X) ,-5) ) ,4,6) ) ) ,12) ) +transpose(((step(((X|(X+transpose(X,12) ) ) +transpose(transpose((X+transpose(X,7) ) ,-5) ,-5) ) ,12) +transpose(transpose((X+(X+transpose(X,12) ) ) ,-7) ,4) ) +transpose(transpose(shuffle(X) ,-7) ,7) ) ,12) ) ) ,7) ) +transpose((transpose(((transpose((((transpose(X,-5) |(transpose(X,-5) |transpose(X,-7) ) ) +transpose(step(arpeggio(X) ,12) ,4) ) +transpose((transpose(transpose(X,4) ,-5) +transpose(X,7) ) ,7) ) ,-5) +transpose(echo((transpose(transpose((X|X) ,-7) ,-7) +transpose(transpose(X,-5) ,7) ) ,4,6) ,12) ) |(((step((transpose(X,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) |step(step((X|echo(X,4,6) ) ,12) ,12) ) +transpose(shuffle(arpeggio(X) ) ,4) ) +transpose((X+transpose((X|X) ,-5) ) ,7) ) ) ,-5) +transpose(((shuffle(((shuffle(X) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ) +transpose(step(transpose(X,-7) ,12) ,12) ) ) +transpose(echo(arpeggio(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,7) ) ,4) ) ,4,6) ,7) ) |transpose(((transpose(shuffle((X+X) ) ,4) +transpose((echo((X|X) ,4,6) |echo(transpose(X,4) ,4,6) ) ,4) ) +transpose((X+transpose(echo(X,4,6) ,12) ) ,7) ) ,4) ) ,7) ) ,12) ) +transpose(step((transpose(transpose(arpeggio((((X+transpose(X,12) ) |(((transpose(X,-5) +transpose(X,12) ) +transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ) |transpose(((echo((X+X) ,4,6) +echo(X,4,6) ) +transpose(transpose((X+X) ,-5) ,7) ) ,-7) ) ) ,4) ,4) +transpose((((step(transpose(transpose((X+transpose(X,12) ) ,-5) ,4) ,12) +(((X+transpose(transpose(X,-5) ,4) ) +transpose(shuffle(echo(X,4,6) ) ,7) ) |((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,7) ) |shuffle(X) ) +transpose(transpose((X|X) ,-5) ,4) ) +transpose(step((X+transpose(X,12) ) ,12) ,7) ) ) ) +transpose(echo((X+X) ,4,6) ,4) ) +transpose(((((((arpeggio(((X+transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) +transpose((X+X) ,4) ) +transpose(arpeggio(step(X,12) ) ,7) ) +transpose(echo((X+transpose(X,7) ) ,4,6) ,12) ) +transpose((X|(((X+transpose(X,12) ) +transpose(transpose(transpose(X,-5) ,-5) ,4) ) +transpose((X|X) ,7) ) ) ,12) ) +transpose(transpose(echo(X,4,6) ,-5) ,4) ) +transpose(shuffle(transpose((X+X) ,-5) ) ,7) ) ,7) ) ,7) ) ,12) ,12) ) ,12) ) +transpose((transpose((transpose(echo(transpose(((transpose(transpose(X,-5) ,4) +transpose((shuffle(X) +X) ,12) ) +transpose(transpose(X,-7) ,12) ) ,-7) ,4,6) ,4) +arpeggio(transpose(((((shuffle(X) +transpose(transpose((X+transpose(X,12) ) ,-7) ,4) ) +transpose(((X|X) +transpose(shuffle(X) ,12) ) ,7) ) +transpose((transpose(X,-5) |X) ,7) ) +transpose(transpose(((X+transpose(X,12) ) +transpose(transpose(X,-7) ,7) ) ,-5) ,7) ) ,-5) ) ) ,4) |(((((step(step(((echo(X,4,6) +transpose((X+X) ,7) ) +transpose((((X+X) +X) +transpose(echo(X,4,6) ,4) ) ,7) ) ,12) ,12) +transpose((transpose((((shuffle(X) +(transpose(X,4) |(X|X) ) ) +transpose((arpeggio((transpose(X,4) |transpose(X,-7) ) ) +transpose((X|X) ,4) ) ,4) ) +transpose(((transpose(X,-5) +transpose(X,7) ) +transpose((transpose(X,-5) +X) ,7) ) ,7) ) ,-5) |transpose(((transpose(echo(X,4,6) ,-7) +(((transpose(X,4) +transpose(X,4) ) +transpose(X,7) ) |(transpose(X,-5) +transpose(((X|X) +transpose((X|X) ,12) ) ,7) ) ) ) +(transpose(X,4) +(((X+transpose(X,12) ) +echo(X,4,6) ) |(X|X) ) ) ) ,-7) ) ,7) ) +transpose(step((((X|(X+transpose(X,12) ) ) +transpose(transpose(transpose(transpose(X,-5) ,4) ,-5) ,4) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) ,12) ,4) ) +transpose(arpeggio(transpose((transpose(X,-5) +shuffle(step(X,12) ) ) ,4) ) ,7) ) +transpose(shuffle(transpose(step(((X+X) +(X+X) ) ,12) ,-5) ) ,4) ) +transpose(echo(echo(transpose(transpose((echo((((shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) |transpose(echo(X,4,6) ,4) ) +transpose((transpose(X,4) +transpose(((X+transpose(X,7) ) |shuffle(X) ) ,-7) ) ,4) ) +transpose(((X+X) +(X+transpose(X,12) ) ) ,7) ) ,4,6) |(shuffle(X) |transpose((X+transpose(X,-7) ) ,4) ) ) ,-7) ,-7) ,4,6) ,4,6) ,7) ) ) ,12) ) +(transpose(((transpose(((echo(((transpose(X,4) +transpose(transpose((X+X) ,-7) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,7) ) ,7) ) ,4,6) +(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) |((echo(X,4,6) +transpose(X,4) ) +transpose((((X+transpose(X,7) ) +transpose(step(X,12) ,4) ) +transpose(shuffle(X) ,7) ) ,7) ) ) ) +((transpose((X+transpose(X,7) ) ,-5) |transpose(X,-7) ) |((X+arpeggio(X) ) +transpose(X,-7) ) ) ) ,-7) +transpose(shuffle(transpose(((transpose(transpose((echo((X+X) ,4,6) +transpose(transpose((X+X) ,-5) ,7) ) ,-5) ,4) +transpose((transpose(X,4) +transpose(transpose((X+transpose(X,12) ) ,-5) ,7) ) ,4) ) +transpose((transpose(((((X+X) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose(X,4) ,12) ) ,-5) |((X+transpose(X,12) ) |shuffle(X) ) ) ,7) ) ,4) ) ,4) ) +transpose(transpose(transpose((shuffle(((X+X) |(X+X) ) ) +echo(((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ,4,6) ) ,-5) ,4) ,7) ) ,-5) +transpose(shuffle((transpose(arpeggio((((transpose(X,-7) +X) +transpose(transpose(arpeggio(X) ,4) ,4) ) +transpose(arpeggio(X) ,7) ) ) ,4) +transpose(transpose(echo((transpose(((((X+transpose(X,12) ) +transpose(transpose(X,4) ,4) ) +transpose(step(X,12) ,7) ) |(arpeggio(X) +transpose(((X+transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) ,7) ) ) ,-5) |transpose((transpose(((transpose(X,4) +transpose((arpeggio((X+X) ) +transpose(((X+X) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ,4) ) +transpose(step((X+transpose(X,4) ) ,12) ,7) ) ,-7) +transpose(echo((X+transpose(X,12) ) ,4,6) ,4) ) ,-5) ) ,4,6) ,4) ,12) ) ) ,12) ) ) +((transpose((transpose(((shuffle(((echo(X,4,6) +step(X,12) ) +transpose(((echo((X|X) ,4,6) +transpose((X+X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) ) |transpose(transpose(transpose(transpose(transpose((X+transpose((X+transpose(X,12) ) ,7) ) ,4) ,4) ,4) ,-5) ,4) ) +transpose((transpose(echo(transpose((((transpose(X,4) +transpose((X+transpose((X+X) ,7) ) ,7) ) +transpose(arpeggio(X) ,4) ) +transpose(((X+transpose(X,12) ) +(X+transpose(X,7) ) ) ,7) ) ,-5) ,4,6) ,4) +transpose(shuffle(((transpose(echo((shuffle(transpose(X,-7) ) +transpose(X,7) ) ,4,6) ,-7) +transpose((transpose(echo(X,4,6) ,-5) +(transpose((((((X+X) +transpose(transpose(X,-7) ,4) ) +transpose(arpeggio(X) ,7) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ,-7) +transpose((transpose((X+X) ,-7) +(echo(X,4,6) +step(X,12) ) ) ,12) ) ) ,7) ) |transpose(transpose((transpose((X+X) ,-7) |transpose(transpose(echo(X,4,6) ,-5) ,-7) ) ,-7) ,4) ) ) ,7) ) ,-5) ) ,4) +transpose((step(transpose(step(shuffle(shuffle(echo(transpose(((X+X) |(X+X) ) ,4) ,4,6) ) ) ,12) ,-5) ,12) +transpose(transpose(transpose(transpose(step(arpeggio(((step(arpeggio(X) ,12) +transpose((((X+transpose(X,7) ) +transpose(transpose((X+transpose(X,12) ) ,-5) ,7) ) |transpose(echo(X,4,6) ,-7) ) ,4) ) +transpose((transpose((shuffle(X) |arpeggio(X) ) ,-5) |transpose(transpose(X,4) ,-7) ) ,7) ) ) ,12) ,-5) ,4) ,-7) ,12) ) ,12) ) ,-7) +transpose(arpeggio(arpeggio((echo((transpose(arpeggio(((transpose(transpose(X,-7) ,-5) +transpose(transpose(X,-7) ,-5) ) +transpose((transpose(shuffle(X) ,4) +X) ,12) ) ) ,4) +shuffle(transpose(step(transpose(transpose(step(transpose(transpose(X,-7) ,-7) ,12) ,4) ,4) ,12) ,-5) ) ) ,4,6) +transpose((transpose((shuffle(transpose(echo(shuffle(X) ,4,6) ,4) ) +transpose(echo(shuffle(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) +transpose((transpose(shuffle(X) ,4) +transpose((X+transpose(arpeggio(X) ,12) ) ,7) ) ,7) ) ) ,4,6) ,7) ) ,4) +transpose(((echo(echo((echo(shuffle(arpeggio(X) ) ,4,6) +transpose(((step(X,12) |((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ) |(transpose(X,-7) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) ,12) ) ,4,6) ,4,6) +transpose(echo(transpose(((X|transpose(X,-7) ) +transpose((X+X) ,12) ) ,4) ,4,6) ,4) ) +transpose((((((step(step((X+transpose(X,7) ) ,12) ,12) +transpose((transpose(transpose(X,-5) ,-7) |(arpeggio(X) |X) ) ,12) ) +transpose((((transpose(transpose(step(X,12) ,4) ,-5) +transpose(echo(transpose(step(X,12) ,4) ,4,6) ,4) ) +transpose((step(X,12) +transpose(transpose(shuffle(X) ,4) ,7) ) ,7) ) |transpose(X,4) ) ,4) ) +transpose(((X+X) +X) ,7) ) |(transpose(arpeggio((X+X) ) ,-5) |(transpose(X,-5) +transpose((X+X) ,12) ) ) ) +((arpeggio(X) |step(X,12) ) |(transpose(X,4) +(X+(transpose(X,-5) +(X+X) ) ) ) ) ) ,7) ) ,7) ) ,7) ) ) ) ,12) ) +transpose((transpose((step(((shuffle(((X|X) |X) ) |transpose((X+X) ,4) ) +transpose(transpose(transpose(echo((((X|X) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4,6) ,-5) ,-7) ,7) ) ,12) +transpose(arpeggio((echo(X,4,6) +transpose(transpose(X,-5) ,-5) ) ) ,-7) ) ,-7) |transpose(echo(step((arpeggio(echo(shuffle(((X+transpose(X,7) ) |(X|X) ) ) ,4,6) ) |transpose((transpose(X,-5) +echo((X+transpose(X,7) ) ,4,6) ) ,4) ) ,12) ,4,6) ,-5) ) ,7) ) ) ,7) )
random seed used was 0

NOTE: Generated phrase was too large ( 34632 ) , it has been truncated at 5000 notes. EXPR = transpose(shuffle(shuffle(step(transpose(transpose((transpose(((transpose((X+X) ,-5) |echo(X,4,6) ) +transpose(arpeggio(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,7) ) ,-5) |step(shuffle(transpose(transpose(X,4) ,4) ) ,12) ) ,4) ,4) ,12) ) ) ,-5)
random seed used was 0 EXPR = ((transpose(transpose(transpose((((transpose(X,-7) |step(transpose(X,4) ,12) ) +transpose(((shuffle(transpose(X,-7) ) +transpose((X|X) ,7) ) +transpose((shuffle(transpose(transpose(X,4) ,-7) ) +echo(X,4,6) ) ,7) ) ,7) ) +echo(transpose(((transpose(X,4) +transpose(transpose(X,4) ,12) ) +(shuffle(X) +transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,7) ) ) ,4) ,4,6) ) ,-7) ,-5) ,4) |shuffle(transpose(transpose(echo(transpose(transpose(transpose(((arpeggio(X) +transpose(transpose(X,-7) ,4) ) +transpose(((transpose(X,4) +transpose(X,4) ) +transpose((X|X) ,7) ) ,7) ) ,-5) ,-7) ,4) ,4,6) ,-5) ,-5) ) ) |arpeggio(echo((echo((step(X,12) +transpose((X+transpose(X,7) ) ,12) ) ,4,6) +((shuffle(transpose(transpose(transpose(X,-5) ,-5) ,-5) ) +transpose(((((transpose((X+transpose(X,4) ) ,4) +transpose((echo(transpose(X,-5) ,4,6) +(X+X) ) ,7) ) +transpose((transpose(transpose(X,4) ,4) +transpose(X,-7) ) ,7) ) +transpose(((transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(X,4) ) ,4) +transpose(shuffle(transpose((X+(X|X) ) ,4) ) ,4) ) +transpose((((X|X) +shuffle(X) ) +step(X,12) ) ,7) ) ,4) ) +transpose((((((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(step(X,12) ,7) ) +((X|X) |arpeggio(X) ) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ,-5) ,7) ) ,7) ) ,4) ) +transpose(transpose(arpeggio(((X+transpose(X,-5) ) +transpose(X,-7) ) ) ,-5) ,7) ) ) ,4,6) ) )
random seed used was 0


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