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:
step((shuffle(transpose(transpose((transpose(((transpose((transpose(((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,-5) +transpose(X,-5) ) ,4) +transpose(arpeggio(((step(transpose(echo(X,4,6) ,4) ,12) +((((X+transpose(X,4) ) +transpose(X,7) ) |echo(X,4,6) ) +transpose(X,7) ) ) +(step(transpose(X,-5) ,12) +transpose(((transpose(X,-7) +X) +transpose((X+transpose(step(X,12) ,12) ) ,7) ) ,12) ) ) ) ,-7) ) |((((transpose(X,-7) +(X+X) ) +((X+transpose(X,7) ) +transpose((X+shuffle(X) ) ,12) ) ) +transpose((arpeggio(echo((X+transpose(X,12) ) ,4,6) ) +transpose(echo(transpose(((X+transpose(X,7) ) +transpose(step(X,12) ,7) ) ,-7) ,4,6) ,12) ) ,4) ) +transpose(transpose((((transpose(X,-5) |X) +transpose((X+transpose(X,7) ) ,-7) ) +((echo(X,4,6) +transpose(X,7) ) +transpose((X+X) ,12) ) ) ,4) ,7) ) ) ,4) +transpose((((echo(transpose((((echo(transpose(X,-5) ,4,6) +transpose(step((X|X) ,12) ,7) ) |((transpose(X,-7) +transpose(transpose(X,-7) ,12) ) |((X+transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ) ) +transpose((shuffle(transpose(X,4) ) +(step(X,12) +X) ) ,7) ) ,-5) ,4,6) +transpose((((step(step(transpose(X,4) ,12) ,12) +transpose(shuffle(((X|X) |X) ) ,7) ) +transpose(((transpose((echo(X,4,6) +((X+transpose(X,7) ) +X) ) ,-7) +transpose((((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) |X) ,4) ) +transpose(step(transpose(X,4) ,12) ,7) ) ,7) ) +transpose(transpose(shuffle(((transpose(X,-7) +transpose(X,12) ) +transpose((transpose(X,-7) +(X|X) ) ,7) ) ) ,-7) ,12) ) ,4) ) +transpose(transpose(((echo(((X+transpose(X,12) ) +transpose(echo(X,4,6) ,7) ) ,4,6) +transpose((X|(X+X) ) ,-7) ) |(echo(((echo(X,4,6) +transpose(transpose(X,-5) ,4) ) +transpose((X|X) ,7) ) ,4,6) +transpose((X|X) ,7) ) ) ,4) ,7) ) |(transpose(X,-5) +transpose(transpose(echo(transpose(transpose(X,4) ,-7) ,4,6) ,-5) ,7) ) ) ,7) ) ,-5) ,-5) ) +(shuffle(transpose(shuffle(arpeggio(((shuffle((transpose(X,4) +echo(X,4,6) ) ) |transpose((((X|X) |X) |transpose((X+transpose(X,12) ) ,4) ) ,4) ) +transpose(((shuffle(transpose(X,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) ,7) ) ) ) ,-7) ) +transpose(((step(arpeggio(transpose(shuffle(echo(shuffle((X+transpose(X,12) ) ) ,4,6) ) ,-7) ) ,12) |(transpose((transpose(echo(transpose(transpose((transpose(X,-7) |transpose(X,-5) ) ,-5) ,-5) ,4,6) ,-7) +transpose(shuffle((echo(transpose(echo(X,4,6) ,-7) ,4,6) +((transpose(transpose(transpose(X,-5) ,-5) ,-7) +(transpose(transpose(X,-5) ,4) |(((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,-5) ) ) ) +transpose(((((X+transpose(X,7) ) +echo(X,4,6) ) +((X+transpose(X,7) ) |echo(X,4,6) ) ) +transpose(echo(transpose((X+transpose(X,7) ) ,-7) ,4,6) ,7) ) ,7) ) ) ) ,12) ) ,4) |(transpose(echo((step((transpose(X,-5) |step((X+transpose(X,12) ) ,12) ) ,12) +(((X|transpose(X,-5) ) +transpose((X|X) ,12) ) +transpose(arpeggio((X+(X+echo(X,4,6) ) ) ) ,7) ) ) ,4,6) ,-7) +transpose(transpose(((((transpose(((X+X) +transpose(X,7) ) ,-5) +transpose(transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,-7) ,12) ) +transpose(transpose((transpose(step(step(arpeggio(X) ,12) ,12) ,4) +(((X+transpose(step(transpose(X,-7) ,12) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(((X|X) |transpose(shuffle(X) ,-7) ) ,7) ) ) ,-5) ,4) ) +transpose((((echo(step((X+X) ,12) ,4,6) |((X+X) +transpose(transpose(X,4) ,7) ) ) +transpose(((X|echo(X,4,6) ) |echo(X,4,6) ) ,4) ) +transpose(echo(transpose((X+transpose(X,12) ) ,-5) ,4,6) ,7) ) ,7) ) +shuffle((transpose((((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(X,4) ) +transpose(((X+transpose(X,12) ) +transpose((X|X) ,12) ) ,7) ) +transpose(transpose(shuffle(X) ,-7) ,-5) ) ,-7) +transpose((transpose(echo(X,4,6) ,-5) |((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ) ,7) ) ) ) ,4) ,-7) ) ) ) +transpose(transpose(echo(step(((transpose((transpose((X|X) ,-5) +transpose((((X+transpose((X+X) ,12) ) +transpose(shuffle(X) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,-7) ,7) ) ,12) ) ,-7) +transpose(echo((((X|(transpose(X,4) |(X|X) ) ) +transpose((X+transpose(X,12) ) ,4) ) +transpose((((X+X) |transpose(X,-5) ) +(X+X) ) ,7) ) ,4,6) ,4) ) +transpose(step(transpose(X,-7) ,12) ,7) ) ,12) ,4,6) ,4) ,12) ) ,12) ) ) ,12)
random seed used was 103137889 EXPR = ((transpose(step(echo(((((X+(X+X) ) +transpose(echo(((X+transpose((X+X) ,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ,7) ) +((((((X|X) +transpose(X,-5) ) +transpose(arpeggio(X) ,4) ) +transpose((((X+transpose(X,7) ) +X) +step(X,12) ) ,12) ) |shuffle((((transpose(X,-5) +transpose(X,4) ) +transpose(X,7) ) |echo((X+X) ,4,6) ) ) ) |((((transpose(X,4) +transpose(shuffle(X) ,4) ) +transpose(X,7) ) |((transpose(X,4) +transpose(X,7) ) |transpose(X,-5) ) ) +(transpose(X,-5) +echo((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) ,4,6) ) ) ) ) +transpose((transpose(((X+transpose(X,12) ) +transpose(transpose(X,-7) ,7) ) ,-5) +(arpeggio((shuffle(transpose(X,-7) ) |((X+transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) ) +transpose((transpose(transpose(X,-7) ,-7) +transpose(((X+echo(X,4,6) ) +transpose(transpose(X,-5) ,7) ) ,7) ) ,7) ) ) ,12) ) ,4,6) ,12) ,-7) +transpose(echo(transpose((shuffle((((transpose(shuffle(X) ,4) +shuffle(X) ) +transpose(transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,-7) ,12) ) |transpose((echo((X+transpose(X,12) ) ,4,6) |step((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +(X|X) ) ,-5) |(X|X) ) ,12) ) ,-7) ) ) +transpose(transpose((((transpose(((X+transpose(X,4) ) +transpose(echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ,7) ) ,-7) |(X+transpose(X,7) ) ) +transpose(step(arpeggio(transpose(X,4) ) ,12) ,4) ) |transpose((transpose((((((X+X) +transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(transpose(X,4) ,7) ) ,4) ) +transpose(((transpose(arpeggio(X) ,-5) +transpose(transpose(X,-7) ,4) ) +transpose((echo(X,4,6) |(X|X) ) ,7) ) ,7) ) ,-5) +((transpose(((X+transpose(X,7) ) |transpose(X,-5) ) ,-7) +step(X,12) ) +transpose(arpeggio(X) ,-7) ) ) ,4) ) ,-5) ,12) ) ,4) ,4,6) ,12) ) +step(transpose(transpose(((step(echo(((arpeggio(transpose(X,4) ) +transpose((arpeggio(shuffle(X) ) |transpose((X+transpose(X,12) ) ,-7) ) ,4) ) +transpose(((((((X+transpose(X,4) ) +transpose(X,7) ) +((X|X) +transpose(X,12) ) ) |(shuffle(X) |(((X|X) +transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(X) ,7) ) ) ) +transpose(((echo(X,4,6) +transpose(shuffle(X) ,4) ) +transpose((((X+transpose(X,7) ) +X) +transpose(shuffle(X) ,4) ) ,7) ) ,4) ) +transpose(((X|X) +transpose(transpose(arpeggio(X) ,4) ,12) ) ,7) ) ,7) ) ,4,6) ,12) +transpose((arpeggio(transpose((X+transpose(transpose((((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose(X,4) ) +transpose(transpose(transpose(X,-7) ,-5) ,7) ) ,-5) ,7) ) ,4) ) +arpeggio((echo(X,4,6) |X) ) ) ,4) ) +transpose((transpose(step(step(X,12) ,12) ,-5) |shuffle(((transpose(transpose(X,4) ,4) |echo((((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +transpose((X|X) ,4) ) +transpose(transpose(X,4) ,7) ) |transpose(step((X+transpose(X,7) ) ,12) ,-7) ) ,4,6) ) +transpose(transpose(transpose((transpose(X,4) |X) ,4) ,4) ,12) ) ) ) ,7) ) ,-5) ,4) ,12) )
random seed used was 0 EXPR = (transpose(((transpose(transpose(transpose(((((shuffle((X+X) ) +transpose((transpose((X+transpose(X,12) ) ,4) +transpose(transpose(X,4) ,7) ) ,4) ) +transpose(echo(arpeggio((X+transpose(X,7) ) ) ,4,6) ,7) ) |((((transpose(X,-5) +transpose(echo(X,4,6) ,7) ) +transpose(X,7) ) |((((arpeggio(X) +transpose((arpeggio(X) |transpose(X,4) ) ,4) ) +transpose(transpose(arpeggio(X) ,4) ,7) ) +transpose((step(X,12) +transpose(transpose(X,4) ,12) ) ,4) ) +transpose((X+X) ,7) ) ) +transpose(echo((((X+X) |shuffle(X) ) |(X|X) ) ,4,6) ,7) ) ) +transpose(echo((transpose(X,4) |transpose(transpose((X|((X+X) +transpose((X+X) ,12) ) ) ,4) ,-5) ) ,4,6) ,7) ) ,4) ,-5) ,4) +echo((((echo(shuffle((transpose(shuffle(transpose(shuffle((X|X) ) ,-5) ) ,-5) |(((X+transpose(X,12) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) |(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) +echo(X,4,6) ) ) ) ) ,4,6) +(transpose((arpeggio((transpose(transpose(((step(X,12) +transpose(transpose(X,-7) ,7) ) +transpose((X+X) ,-7) ) ,-5) ,-7) +transpose(transpose(transpose(echo(transpose(shuffle(X) ,-5) ,4,6) ,-5) ,-5) ,7) ) ) +arpeggio(arpeggio((arpeggio((((X|X) +transpose((X|X) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) +transpose(transpose(((arpeggio(X) +transpose(((transpose(X,4) +transpose((X+transpose(X,7) ) ,4) ) +transpose(step(X,12) ,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,4) ,12) ) ) ) ) ,4) +transpose((((transpose(transpose((X|transpose(X,-5) ) ,-7) ,-7) +((shuffle(X) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose(arpeggio(X) ,-7) ,7) ) ) |(((echo((X+X) ,4,6) +transpose((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +echo(transpose(X,4) ,4,6) ) ,4) ) +transpose((transpose(X,-7) +transpose((X+X) ,7) ) ,7) ) |transpose(transpose((X|X) ,4) ,4) ) ) |transpose(transpose(echo(echo(X,4,6) ,4,6) ,4) ,-7) ) ,12) ) ) |(step(echo(echo((((X|X) +(X+X) ) +(((X+transpose(X,4) ) +transpose(X,7) ) +arpeggio(X) ) ) ,4,6) ,4,6) ,12) +transpose((transpose(transpose(transpose(((X|X) |X) ,-7) ,-5) ,4) |arpeggio(transpose(echo((X+transpose(echo(shuffle(X) ,4,6) ,12) ) ,4,6) ,4) ) ) ,-7) ) ) |((transpose(echo(echo(transpose(X,-7) ,4,6) ,4,6) ,-5) +transpose(((((transpose((X|X) ,4) +X) +transpose((X|((X+transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ) ,4) ) +transpose((shuffle(X) +transpose((X|X) ,12) ) ,7) ) +arpeggio(transpose(X,-7) ) ) ,12) ) +(((((shuffle((shuffle(X) |((transpose(X,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ) ) +(transpose(X,-7) |((transpose(X,-5) |X) |transpose(X,-7) ) ) ) +transpose((shuffle(arpeggio(X) ) +(((X|X) +transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ) ,4) ) +transpose(((((transpose(X,-7) +X) +transpose(echo(echo(arpeggio(X) ,4,6) ,4,6) ,4) ) +transpose(transpose((transpose(X,-5) |(X+transpose(X,7) ) ) ,4) ,7) ) +transpose((step(shuffle(X) ,12) +transpose((((transpose(X,-5) |X) +transpose(arpeggio(X) ,4) ) +transpose(transpose((X+X) ,-5) ,7) ) ,7) ) ,12) ) ,7) ) +transpose(echo(((X+transpose(X,12) ) |X) ,4,6) ,4) ) +transpose((((transpose(X,-5) +X) +transpose(transpose(X,4) ,7) ) +transpose(((((step(X,12) +echo(X,4,6) ) +transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,7) ) +transpose(transpose(arpeggio(arpeggio(X) ) ,4) ,4) ) +transpose(transpose(step(X,12) ,-7) ,7) ) ,7) ) ,7) ) ) ) ,4,6) ) +arpeggio(echo(echo((((transpose(shuffle(((echo(transpose((X+transpose(transpose(X,-7) ,12) ) ,4) ,4,6) +transpose(transpose((transpose(step(shuffle(X) ,12) ,-7) +transpose((transpose(X,-5) +transpose(X,7) ) ,7) ) ,-7) ,4) ) +transpose(((transpose(transpose(X,-5) ,-5) +transpose((transpose(((X+transpose(X,7) ) |X) ,-7) |(X|(shuffle(transpose(X,-5) ) +transpose(X,7) ) ) ) ,4) ) +transpose((((X|(X+transpose(echo(X,4,6) ,7) ) ) +transpose((transpose(X,-7) |(X|X) ) ,7) ) +transpose(((X|X) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ) ,7) ) ,7) ) ) ,-7) |((((echo(X,4,6) +transpose(X,4) ) +transpose((echo(X,4,6) +arpeggio(X) ) ,7) ) +transpose(transpose(((shuffle((X+transpose(X,7) ) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-5) ,7) ) ,-7) ,7) ) +transpose(shuffle(transpose(((echo(X,4,6) +transpose((X|X) ,-7) ) +transpose(shuffle(X) ,7) ) ,4) ) ,7) ) ) |shuffle(step(((((transpose((X|X) ,-7) +transpose(transpose((X|X) ,-5) ,12) ) +(X|step((X|X) ,12) ) ) +((X+transpose(shuffle(X) ,7) ) +transpose(transpose(transpose(X,4) ,-5) ,-5) ) ) +transpose((step((step(X,12) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) +transpose(((transpose((step(X,12) +transpose((X+X) ,7) ) ,-7) +transpose(transpose(X,-7) ,4) ) +transpose(((X+transpose(step(X,12) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) ,12) ) ,7) ) ,12) ) ) |(transpose(transpose(echo(((transpose(shuffle(X) ,-5) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) |(X|echo(X,4,6) ) ) ,4,6) ,4) ,4) +transpose(transpose((((transpose(echo(transpose(transpose(((step(transpose(X,-7) ,12) +transpose((X|X) ,4) ) +transpose((X+transpose(shuffle(X) ,12) ) ,7) ) ,4) ,4) ,4,6) ,-5) +transpose(((((transpose(X,-5) +step(X,12) ) +transpose((transpose((X+transpose(X,12) ) ,-7) +transpose(X,-7) ) ,4) ) +transpose(echo((X|X) ,4,6) ,7) ) +(transpose((((X|X) |X) +transpose((X|X) ,12) ) ,-5) +((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,-5) ) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) ) ) ,-7) ) +transpose((transpose((((arpeggio(((X+transpose(X,7) ) +transpose(X,12) ) ) +(step(step(X,12) ,12) +transpose(X,7) ) ) +transpose((transpose(transpose(X,-7) ,-5) +transpose((echo((X|X) ,4,6) |transpose(X,-7) ) ,12) ) ,4) ) +transpose(((shuffle(X) +transpose((X+transpose((X+(X|X) ) ,12) ) ,12) ) +transpose((shuffle((X|X) ) +X) ,12) ) ,7) ) ,-5) +transpose((((((X+transpose(X,12) ) +transpose((X|X) ,12) ) +transpose(((X|X) +transpose((X+X) ,7) ) ,12) ) +transpose((X+X) ,7) ) +transpose(transpose(X,-7) ,4) ) ,4) ) ,4) ) +transpose(transpose((step(step(transpose(X,-5) ,12) ,12) |(echo(((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,4,6) +transpose(((((X+X) +transpose(X,4) ) +transpose(arpeggio(X) ,7) ) +transpose(transpose(X,4) ,12) ) ,12) ) ) ,-5) ,7) ) ,4) ,12) ) ) ,4,6) ,4,6) ) ) ,-5) +transpose((transpose(((shuffle(transpose(shuffle((arpeggio((transpose(X,-5) +transpose(X,-5) ) ) |shuffle((X+transpose(X,7) ) ) ) ) ,4) ) |transpose(((((transpose(X,-5) |shuffle(X) ) +transpose(arpeggio(step(X,12) ) ,12) ) +step(echo(X,4,6) ,12) ) +transpose((X|(X|(X+X) ) ) ,-5) ) ,-7) ) +transpose(((transpose((X+transpose(transpose(X,-5) ,12) ) ,-7) +transpose(step((echo(((((arpeggio(X) |(transpose(X,-5) +X) ) |transpose((((X|X) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-5) ) +transpose(echo(X,4,6) ,7) ) +transpose((((((X+X) +transpose((X|X) ,4) ) +transpose((X|X) ,7) ) +transpose((X+transpose(transpose(X,-7) ,12) ) ,4) ) +transpose(shuffle(X) ,7) ) ,4) ) ,4,6) +transpose((X+echo(X,4,6) ) ,-7) ) ,12) ,7) ) |((echo((transpose(step(arpeggio(X) ,12) ,4) |((echo(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,4,6) +transpose(echo(transpose(X,4) ,4,6) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ,4,6) +transpose(arpeggio(transpose(shuffle((transpose(X,-7) +(shuffle(X) +arpeggio((X+transpose(X,12) ) ) ) ) ) ,-5) ) ,7) ) +(((echo(transpose(transpose(step(X,12) ,4) ,-5) ,4,6) |(((step(X,12) +transpose(((X+transpose(X,7) ) +(X+transpose(X,12) ) ) ,12) ) +transpose(transpose(((X+X) +(X+X) ) ,-7) ,4) ) +transpose(transpose(X,-5) ,7) ) ) +transpose(arpeggio(transpose(X,-7) ) ,4) ) +transpose((transpose((shuffle(echo(X,4,6) ) +((X+transpose(X,12) ) +(transpose(echo(X,4,6) ,-5) +(transpose(X,-5) +transpose(X,7) ) ) ) ) ,-5) +step(transpose(((X+X) +X) ,4) ,12) ) ,7) ) ) ) ,12) ) ,-5) +transpose((transpose(((transpose(transpose(((echo(transpose(X,-7) ,4,6) +transpose(((step(step(X,12) ,12) +shuffle(((transpose(X,-7) +X) +transpose(X,-7) ) ) ) |((transpose(transpose(X,-7) ,-5) |(X|X) ) +transpose(transpose(transpose(X,4) ,-7) ,12) ) ) ,12) ) |((transpose(((shuffle(X) |transpose(step(X,12) ,-7) ) +transpose(X,7) ) ,-5) |step(echo(X,4,6) ,12) ) |((((((shuffle(X) +transpose(X,4) ) +transpose(step(X,12) ,12) ) +transpose((((X+X) +((X+transpose(X,4) ) +transpose(X,7) ) ) |(transpose(X,4) +transpose(X,4) ) ) ,4) ) +transpose(((((X+transpose(step(X,12) ,4) ) +transpose(echo(X,4,6) ,7) ) +(X+step(X,12) ) ) |(((echo(X,4,6) +transpose((X|X) ,4) ) +transpose((X+X) ,7) ) |transpose(X,4) ) ) ,7) ) +transpose((shuffle(X) +(X+X) ) ,4) ) +transpose(((transpose((((X+transpose(X,4) ) +transpose(X,7) ) |(X+transpose(X,12) ) ) ,-7) +transpose(transpose((X|(X|X) ) ,-5) ,4) ) +transpose((transpose(X,-5) +transpose((echo(X,4,6) +transpose((X+X) ,4) ) ,7) ) ,7) ) ,7) ) ) ) ,4) ,4) +transpose(echo(((transpose((arpeggio((X+transpose(X,12) ) ) +arpeggio(transpose(X,-5) ) ) ,-7) |((((X+(X|X) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-5) ,7) ) +echo(shuffle(X) ,4,6) ) ) |(((step(arpeggio(transpose(X,-5) ) ,12) +shuffle(((shuffle(X) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) +transpose(X,12) ) ) ) +(((((X+transpose(X,12) ) +transpose(transpose(X,-5) ,4) ) +transpose(shuffle(X) ,7) ) +((transpose((X|X) ,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ) |transpose(step(X,12) ,4) ) ) |transpose(((transpose(transpose(X,-7) ,-7) +transpose(transpose((X+transpose((X|(X+X) ) ,12) ) ,-5) ,4) ) +transpose(((X+X) |X) ,7) ) ,-5) ) ) ,4,6) ,4) ) +transpose(transpose(transpose(((((step(X,12) +transpose((X+transpose(X,12) ) ,12) ) +transpose(step(transpose(X,-5) ,12) ,12) ) +transpose(transpose((X+transpose((X+transpose(X,12) ) ,7) ) ,4) ,12) ) +(((echo(transpose(X,-5) ,4,6) +transpose((((step(X,12) +X) |(X+transpose(transpose(X,4) ,12) ) ) +transpose(transpose(X,-7) ,7) ) ,7) ) +transpose(arpeggio((arpeggio(X) |arpeggio(X) ) ) ,4) ) +transpose(transpose(((X|X) +X) ,-5) ,7) ) ) ,-5) ,-5) ,7) ) ,-7) +transpose(transpose(shuffle(((transpose(echo((echo((X+transpose(X,12) ) ,4,6) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +(X|X) ) |X) +((transpose(X,-5) +transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ) ,12) ) ,4,6) ,-7) |step((((transpose(X,-7) +transpose(((transpose(X,4) +X) +transpose(((transpose(X,4) |shuffle((X+X) ) ) |step(transpose((X+X) ,-5) ,12) ) ,12) ) ,4) ) +transpose((step(transpose((((X+transpose(X,4) ) +transpose(X,7) ) |X) ,4) ,12) +transpose(echo((transpose(X,-7) +transpose(X,12) ) ,4,6) ,7) ) ,7) ) +transpose(step((arpeggio(transpose(transpose(step(X,12) ,4) ,4) ) +transpose((step(X,12) |((X+transpose((X+X) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ,7) ) ,12) ,7) ) ,12) ) +(transpose(((arpeggio(((((((X+transpose(X,7) ) +transpose(arpeggio(X) ,12) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) +transpose(echo((X|X) ,4,6) ,4) ) +transpose((X+transpose(shuffle(X) ,12) ) ,12) ) +echo(transpose(X,4) ,4,6) ) ) +transpose(echo(transpose(transpose(transpose(transpose((X+X) ,-5) ,-5) ,-5) ,-7) ,4,6) ,4) ) +transpose(transpose(step(((echo(X,4,6) |arpeggio(transpose(X,-5) ) ) |(((X+X) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,-5) ,7) ) ) ,12) ,-5) ,7) ) ,4) |((((transpose(((transpose(X,-7) +transpose(X,12) ) +transpose(step((X|X) ,12) ,7) ) ,-7) |shuffle(step(step(transpose((X+transpose((X|X) ,12) ) ,-5) ,12) ,12) ) ) +transpose(((((X+X) |shuffle(transpose(X,-7) ) ) |((X+X) +(X+X) ) ) +transpose(((((step(X,12) +(X|X) ) +(((X+transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,-7) ,7) ) ) +transpose(transpose((shuffle(X) +transpose(echo(X,4,6) ,7) ) ,-5) ,12) ) +transpose(((X+transpose(X,7) ) +transpose(arpeggio(X) ,7) ) ,12) ) ,7) ) ,7) ) +transpose(transpose(transpose(arpeggio(transpose(X,-5) ) ,-7) ,4) ,4) ) +transpose(transpose(shuffle((arpeggio(shuffle(X) ) +transpose((transpose(X,4) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,7) ) ,7) ) ) ,-5) ,7) ) ) ) ) ,-5) ,12) ) ,7) ) ,7) )
random seed used was 0

NOTE: Generated phrase was too large ( 40136 ) , it has been truncated at 5000 notes. EXPR = step(echo(transpose(arpeggio(transpose(echo((((transpose((((X+transpose(X,12) ) |(X+transpose(X,12) ) ) +transpose(transpose(shuffle(echo(X,4,6) ) ,4) ,7) ) ,-5) |((((transpose(((transpose(X,-5) +transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,-5) +transpose(transpose(echo(X,4,6) ,-5) ,4) ) +transpose((transpose(X,-7) |X) ,7) ) +((shuffle(echo(X,4,6) ) +transpose(transpose(transpose(transpose(X,-5) ,4) ,-5) ,4) ) +transpose(step((X+(X+X) ) ,12) ,7) ) ) +transpose(((step(transpose(arpeggio(X) ,-7) ,12) +transpose(transpose((transpose(X,-5) +transpose(transpose(X,-7) ,12) ) ,-5) ,4) ) +transpose((step(X,12) |((arpeggio(transpose(X,4) ) +transpose(step(X,12) ,4) ) +transpose(transpose(step(X,12) ,4) ,7) ) ) ,7) ) ,12) ) ) |step(echo((echo(echo(X,4,6) ,4,6) +transpose(transpose(transpose(X,-7) ,-5) ,12) ) ,4,6) ,12) ) +transpose((((arpeggio((X+X) ) +transpose(transpose(X,4) ,4) ) +transpose(transpose(arpeggio(X) ,4) ,7) ) +transpose((X+X) ,12) ) ,12) ) ,4,6) ,-5) ) ,4) ,4,6) ,12)
random seed used was 0

NOTE: Generated phrase was too large ( 17200 ) , it has been truncated at 5000 notes.


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