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(shuffle(((step((transpose(shuffle((X+(X|X) ) ) ,-5) +step(transpose((X+transpose((echo(shuffle(X) ,4,6) +transpose(transpose(transpose(transpose(X,4) ,-5) ,-7) ,12) ) ,7) ) ,-7) ,12) ) ,12) +transpose(transpose((((transpose(transpose((transpose(X,4) |X) ,4) ,-5) +transpose(arpeggio((arpeggio(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(transpose(arpeggio(X) ,-5) ,4) ) ) ,4) ) +transpose(transpose(transpose(transpose(((transpose((X+transpose(X,12) ) ,-5) +transpose((X|X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,4) ,-7) ,4) ,7) ) |transpose(step(transpose(arpeggio(transpose(X,4) ) ,-7) ,12) ,-7) ) ,4) ,7) ) +transpose(transpose((arpeggio(shuffle(((transpose(((echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +(echo(transpose(X,4) ,4,6) |((echo(X,4,6) +transpose(X,4) ) +transpose(X,7) ) ) ) ,-7) +transpose((transpose(transpose(X,-7) ,-7) +transpose((transpose(transpose(arpeggio(X) ,-5) ,-5) |transpose(echo(X,4,6) ,4) ) ,7) ) ,4) ) +transpose(step((((shuffle(X) +transpose(arpeggio(X) ,7) ) +transpose(arpeggio(X) ,4) ) +transpose(X,7) ) ,12) ,7) ) ) ) |(shuffle((step((X|(X+transpose(transpose(X,-5) ,12) ) ) ,12) +transpose(((echo(X,4,6) +(((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,-5) ) ) +transpose(echo(transpose(X,4) ,4,6) ,-7) ) ,12) ) ) +(shuffle((transpose(X,-7) |((transpose(X,4) +transpose(transpose(X,-5) ,4) ) +transpose(X,7) ) ) ) +transpose(echo((arpeggio(X) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,4,6) ,12) ) ) ) ,-5) ,7) ) ) ,-5)
random seed used was 3442951 EXPR = step(transpose(transpose(transpose((transpose(((transpose(step((((transpose((X|X) ,-7) +transpose((echo(X,4,6) |step(X,12) ) ,7) ) +echo((transpose(transpose(transpose(X,4) ,-7) ,-5) |(((((X+X) |transpose(X,-7) ) +transpose(X,12) ) +transpose(step(echo(X,4,6) ,12) ,12) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ) ,4,6) ) +transpose(((transpose((shuffle(X) +transpose(arpeggio(X) ,12) ) ,-5) |(((X|X) +transpose((X+X) ,12) ) +(arpeggio(transpose(X,-5) ) +transpose(transpose(X,4) ,12) ) ) ) +arpeggio(X) ) ,-5) ) ,12) ,-5) +transpose((((transpose(echo(transpose((arpeggio(X) +transpose(transpose(X,4) ,7) ) ,-7) ,4,6) ,-7) +transpose(shuffle(step((shuffle((X+X) ) |(X+transpose(X,4) ) ) ,12) ) ,12) ) +transpose(transpose(transpose(echo(arpeggio(transpose(((transpose(echo(X,4,6) ,-7) +transpose(echo(X,4,6) ,4) ) +transpose(((transpose(X,4) +transpose((X|X) ,4) ) +transpose(X,7) ) ,7) ) ,-5) ) ,4,6) ,4) ,-5) ,4) ) +transpose(transpose(((arpeggio(transpose(((((echo(X,4,6) +transpose((transpose(X,4) +X) ,4) ) +transpose((X|X) ,7) ) +transpose(transpose(echo(shuffle(X) ,4,6) ,-5) ,12) ) |(((transpose(X,4) |transpose(X,4) ) +transpose(transpose(X,4) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ,-7) ) +transpose(transpose(transpose(echo(transpose(X,-7) ,4,6) ,4) ,4) ,4) ) +transpose(echo(shuffle(((((X+transpose(X,7) ) |X) +transpose(X,7) ) +transpose(arpeggio(transpose(shuffle(X) ,-5) ) ,12) ) ) ,4,6) ,7) ) ,4) ,7) ) ,4) ) +transpose((shuffle(transpose(step(X,12) ,-5) ) |transpose(transpose(((transpose(X,-5) +transpose(X,4) ) +transpose(X,7) ) ,-7) ,-7) ) ,7) ) ,-7) |(shuffle(transpose(transpose((step(shuffle(step(shuffle((transpose(X,-5) |X) ) ,12) ) ,12) |echo((((((step(X,12) +transpose(X,4) ) +transpose(X,7) ) +(X|X) ) +transpose(transpose(shuffle(X) ,-5) ,7) ) +transpose(transpose((transpose(shuffle(transpose(transpose(X,-7) ,-5) ) ,4) |echo((X+transpose(X,12) ) ,4,6) ) ,-5) ,12) ) ,4,6) ) ,-5) ,-7) ) |step((transpose(step(((transpose(X,-5) +transpose(arpeggio(transpose(X,-7) ) ,4) ) +transpose((arpeggio(transpose(X,-7) ) +transpose(X,7) ) ,7) ) ,12) ,4) +transpose(transpose(transpose((transpose(step(step(X,12) ,12) ,-7) |transpose((X+X) ,4) ) ,-5) ,-5) ,7) ) ,12) ) ) ,4) ,4) ,4) ,12)
random seed used was 0 EXPR = ((transpose(((transpose(transpose(arpeggio(transpose(((transpose(transpose(shuffle((X+transpose(transpose(X,-5) ,7) ) ) ,-5) ,-5) +transpose(step((X+(X+transpose(X,7) ) ) ,12) ,7) ) +transpose(((transpose(((X+transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ,-5) |X) +transpose((transpose(step((X+transpose(X,12) ) ,12) ,4) +shuffle((X+transpose(transpose(X,4) ,12) ) ) ) ,12) ) ,7) ) ,-7) ) ,4) ,4) +transpose((echo(transpose((((((transpose(transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-7) ,-5) +transpose((X+transpose(X,12) ) ,4) ) +transpose((X|transpose(X,-7) ) ,7) ) |transpose(transpose(transpose(transpose(X,-7) ,-7) ,-5) ,4) ) +(transpose(X,-5) +transpose(echo(transpose((X+transpose(X,7) ) ,-5) ,4,6) ,12) ) ) +(step(transpose((transpose(shuffle(X) ,-5) |((echo(X,4,6) +transpose(X,7) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ) ,-7) ,12) +transpose(echo((echo(transpose(X,-7) ,4,6) |(transpose(X,-7) +transpose(((transpose(X,4) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) ) ,4,6) ,7) ) ) ,-7) ,4,6) +transpose(((arpeggio(transpose((X|X) ,4) ) +transpose((((transpose(transpose(X,-7) ,-7) +transpose(((transpose(X,-7) +transpose(X,12) ) |shuffle(transpose(X,-7) ) ) ,4) ) +transpose((transpose(transpose(X,-5) ,-5) +transpose(((transpose(X,-7) |X) +transpose(echo(X,4,6) ,7) ) ,12) ) ,7) ) |transpose(transpose((X+transpose((X+X) ,12) ) ,4) ,4) ) ,12) ) +transpose((echo(echo((transpose(arpeggio(X) ,-7) |((arpeggio(X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ,4,6) ,4,6) +transpose(transpose(step(step(X,12) ,12) ,4) ,12) ) ,12) ) ,7) ) ,4) ) +transpose(((transpose(transpose((step((transpose(arpeggio(arpeggio(X) ) ,4) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) ,12) +(((((step((transpose(X,-7) +transpose(step(X,12) ,12) ) ,12) +transpose(((X+transpose(transpose(transpose(X,4) ,-5) ,4) ) +transpose((X|X) ,7) ) ,7) ) +transpose((transpose(transpose(X,-7) ,4) +transpose(transpose(X,4) ,-5) ) ,7) ) +transpose((((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |((transpose(step(X,12) ,-5) +transpose(transpose(transpose(X,4) ,4) ,4) ) +transpose(((X|X) |X) ,7) ) ) |arpeggio(transpose(transpose(X,-7) ,-5) ) ) ,12) ) +transpose((arpeggio((X|transpose(X,4) ) ) |(transpose(X,4) |X) ) ,4) ) +transpose(((((step(echo(((X+transpose(X,12) ) +transpose(transpose(X,-5) ,7) ) ,4,6) ,12) +transpose(arpeggio(arpeggio(step(X,12) ) ) ,4) ) +transpose(echo((echo(transpose(X,4) ,4,6) |arpeggio(transpose(X,-7) ) ) ,4,6) ,7) ) +transpose(transpose(transpose(transpose(X,4) ,-5) ,4) ,12) ) +transpose(transpose((((X+((X+transpose(X,4) ) +transpose(X,7) ) ) +X) +(((transpose(X,4) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,-5) ) ) ,-5) ,7) ) ,7) ) ) ,-7) ,-5) +((transpose(arpeggio(((transpose(X,4) +transpose((((transpose(X,4) +transpose(X,4) ) +transpose(X,7) ) +shuffle((X|X) ) ) ,12) ) +transpose(step(((shuffle(((X+transpose((X+transpose(X,7) ) ,12) ) |arpeggio(transpose(X,-5) ) ) ) +transpose(step(((transpose(X,-5) +X) |transpose(X,4) ) ,12) ,4) ) +transpose(((transpose(transpose(X,-5) ,-5) +transpose(transpose(X,-5) ,4) ) +transpose(transpose((X|X) ,-7) ,7) ) ,7) ) ,12) ,7) ) ) ,-7) +transpose(((step((echo(echo((X+transpose(X,12) ) ,4,6) ,4,6) +transpose((X+transpose(X,7) ) ,7) ) ,12) +(transpose(transpose((transpose(X,4) +transpose(transpose(X,4) ,12) ) ,-5) ,4) |echo(transpose(transpose(((X|X) +transpose(transpose(X,4) ,7) ) ,-5) ,4) ,4,6) ) ) |(((transpose(transpose((X+transpose(X,12) ) ,-5) ,-7) |transpose(echo(X,4,6) ,-5) ) +arpeggio(transpose(transpose(shuffle(X) ,-5) ,-5) ) ) +transpose((X|transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) ,7) ) ) ,12) ) +transpose(step((echo((((shuffle(transpose((X+transpose(transpose(X,-7) ,7) ) ,4) ) +transpose((((X|X) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) ,7) ) +((((transpose(X,4) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) +transpose(echo(((transpose(X,4) +transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ,12) ) +transpose(((((arpeggio(X) +transpose((X+X) ,7) ) +transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) +transpose(transpose(transpose(X,4) ,-7) ,4) ) +transpose((transpose(X,-7) |transpose((X|X) ,-5) ) ,7) ) ,7) ) ) |transpose((echo(step(X,12) ,4,6) |(step(X,12) |X) ) ,-5) ) ,4,6) +transpose(transpose(echo(((transpose(echo(X,4,6) ,4) +transpose((echo(shuffle(X) ,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,12) ) +transpose(shuffle(echo((X+transpose(X,12) ) ,4,6) ) ,-7) ) ,4,6) ,-7) ,12) ) ,12) ,12) ) ) +transpose(((((echo(transpose(transpose(transpose(arpeggio(echo(X,4,6) ) ,-7) ,-5) ,-7) ,4,6) +transpose((transpose(transpose(transpose(step((X|X) ,12) ,-5) ,-5) ,-5) +transpose((transpose(X,-7) +transpose(transpose((transpose(X,-5) +transpose(echo(X,4,6) ,12) ) ,-5) ,7) ) ,12) ) ,4) ) +transpose(transpose(step(echo(arpeggio(echo(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose((X|X) ,7) ) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ,4,6) ) ,4,6) ,12) ,4) ,7) ) |(((transpose(transpose((((X|X) |(X|shuffle((X|X) ) ) ) +transpose(((X|X) +((X|X) +transpose(transpose(X,-5) ,7) ) ) ,12) ) ,-5) ,-7) +transpose(step(shuffle(((transpose(X,-7) +transpose(transpose(X,-5) ,7) ) |((echo(X,4,6) +transpose(transpose(X,-5) ,12) ) +transpose(arpeggio((X+transpose(transpose(X,-7) ,12) ) ) ,12) ) ) ) ,12) ,12) ) +transpose((((((arpeggio(X) +transpose(X,12) ) |(X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) +transpose(((X+transpose(transpose(X,-7) ,12) ) +transpose(transpose(X,4) ,12) ) ,7) ) |step(transpose((((transpose(X,-5) +transpose(X,12) ) +transpose((transpose(X,4) +transpose(arpeggio(X) ,12) ) ,7) ) +transpose(arpeggio(transpose(X,-7) ) ,7) ) ,4) ,12) ) |((((((((X+transpose(X,12) ) |X) +transpose(transpose(transpose(transpose(X,4) ,4) ,4) ,4) ) +transpose(transpose(arpeggio(X) ,-7) ,7) ) +transpose(transpose((transpose(X,4) |transpose(transpose(X,-5) ,-5) ) ,-5) ,4) ) +transpose(((transpose(transpose(echo(X,4,6) ,-5) ,4) +transpose((transpose(X,-7) +transpose(transpose(X,-5) ,7) ) ,12) ) +transpose(transpose(transpose(shuffle(X) ,4) ,-7) ,12) ) ,7) ) |(((transpose(shuffle((X|X) ) ,4) +transpose(transpose(transpose(X,-5) ,-5) ,4) ) +transpose((transpose(X,-5) +X) ,7) ) +arpeggio((arpeggio(X) |echo(X,4,6) ) ) ) ) +transpose(((((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(transpose(step(arpeggio(X) ,12) ,4) ,7) ) +transpose(echo(transpose(step(transpose((X|X) ,-7) ,12) ,-7) ,4,6) ,12) ) ,7) ) ) ,7) ) +transpose(shuffle(transpose(transpose((((transpose(X,4) +transpose(X,12) ) +transpose(echo(transpose((X+transpose(X,7) ) ,-5) ,4,6) ,4) ) +transpose((X|arpeggio(shuffle(X) ) ) ,7) ) ,4) ,-5) ) ,-7) ) ) +transpose(transpose(echo(transpose(transpose(transpose(transpose(transpose(echo((X+X) ,4,6) ,-5) ,-5) ,4) ,4) ,4) ,4,6) ,-7) ,7) ) ,12) ) ,7) ) ,-7) |((step(arpeggio(((((transpose(((transpose((X|transpose(step(X,12) ,-7) ) ,-7) +transpose((transpose(shuffle(transpose(X,-5) ) ,-5) |transpose((X|X) ,-5) ) ,4) ) +transpose(transpose(transpose(transpose(X,-7) ,-7) ,-5) ,7) ) ,-5) +transpose(transpose(transpose(step(echo((X|shuffle(X) ) ,4,6) ,12) ,4) ,4) ,4) ) +transpose((transpose(transpose(((step(echo((X+X) ,4,6) ,12) +transpose(transpose((X+transpose(echo((X|X) ,4,6) ,12) ) ,4) ,4) ) +transpose(transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,-7) ,7) ) ,-5) ,-7) +(transpose(((arpeggio((((X+transpose(X,12) ) +transpose(echo(X,4,6) ,4) ) +transpose((X|X) ,7) ) ) +transpose(shuffle(X) ,4) ) +transpose(arpeggio(((X+transpose(X,12) ) |X) ) ,7) ) ,4) +transpose((transpose(transpose(((X+transpose((X+transpose(X,7) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ,-5) |step((arpeggio(X) +transpose(transpose(X,-7) ,12) ) ,12) ) ,7) ) ) ,7) ) |arpeggio(transpose(transpose(transpose(X,4) ,-7) ,-5) ) ) +transpose(transpose(((echo(echo(echo(X,4,6) ,4,6) ,4,6) +transpose(((((arpeggio(transpose((transpose(transpose(X,-5) ,4) +(((X+X) +transpose(transpose((X+transpose(X,7) ) ,4) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,4) ) +transpose(transpose(((transpose(transpose(step(X,12) ,4) ,-7) +transpose(X,4) ) +transpose(((X|X) |(X+X) ) ,7) ) ,-5) ,4) ) +transpose(transpose((echo(transpose(X,-5) ,4,6) +transpose(echo(transpose(X,-5) ,4,6) ,12) ) ,4) ,7) ) +transpose(step(transpose(transpose(X,-7) ,4) ,12) ,4) ) +transpose(transpose((transpose(arpeggio((X|X) ) ,4) +(X+transpose(X,7) ) ) ,-7) ,7) ) ,4) ) +transpose(((echo(transpose(X,4) ,4,6) +shuffle(X) ) |transpose(step(transpose(X,4) ,12) ,-5) ) ,7) ) ,-5) ,7) ) ) ,12) +transpose(((transpose(step(echo((transpose(transpose(transpose(transpose(X,-5) ,-7) ,-5) ,4) +transpose(((((step((X+transpose(X,7) ) ,12) +transpose((transpose(X,-5) +transpose(X,-5) ) ,12) ) +transpose(transpose(((X|X) +transpose(X,7) ) ,4) ,7) ) |transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ) +transpose(arpeggio(((arpeggio(X) +transpose(transpose(X,-5) ,12) ) +transpose(transpose(step(transpose(X,-7) ,12) ,4) ,12) ) ) ,-7) ) ,12) ) ,4,6) ,12) ,-5) +transpose((((transpose(((transpose(transpose(step(X,12) ,4) ,4) +transpose((echo(X,4,6) +transpose(transpose((X|X) ,4) ,7) ) ,4) ) +transpose(transpose(((transpose(X,4) |X) +transpose(X,12) ) ,4) ,7) ) ,-7) +transpose((arpeggio(transpose(((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) |echo(X,4,6) ) +transpose(X,7) ) ,-5) ) +transpose(arpeggio(shuffle(transpose(echo(shuffle(X) ,4,6) ,4) ) ) ,-5) ) ,4) ) +transpose((((transpose((transpose(((transpose(step(X,12) ,-7) +transpose(transpose(X,-5) ,12) ) +step(shuffle(X) ,12) ) ,4) +transpose(((transpose(X,-5) +(shuffle(X) +transpose((X|X) ,7) ) ) |(transpose((X+transpose(X,7) ) ,4) +(transpose(transpose(X,-5) ,4) |transpose(X,-7) ) ) ) ,12) ) ,-7) +transpose(shuffle(transpose(transpose(step(((arpeggio(X) +transpose(transpose(transpose(echo(X,4,6) ,4) ,-7) ,4) ) +transpose(((X|X) +transpose((X+X) ,12) ) ,7) ) ,12) ,4) ,-5) ) ,4) ) +transpose((step(transpose((arpeggio((arpeggio(X) |transpose(X,4) ) ) +(((transpose(X,-5) +(X+transpose(X,12) ) ) +transpose((X+transpose(X,7) ) ,4) ) +transpose(transpose(step(X,12) ,4) ,7) ) ) ,-5) ,12) +transpose((step((step(((((X+transpose(X,12) ) +transpose(arpeggio(X) ,4) ) +transpose((X+X) ,7) ) |(X+transpose(X,7) ) ) ,12) |transpose(echo((X|step(X,12) ) ,4,6) ,-7) ) ,12) +((transpose(transpose(transpose((X+X) ,4) ,-5) ,-5) +transpose(transpose(shuffle((X+shuffle(X) ) ) ,-5) ,4) ) +transpose(((shuffle(X) +transpose((step((X|X) ,12) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,7) ) ,4) ) +transpose(shuffle((transpose(step(X,12) ,-5) +X) ) ,7) ) ,7) ) ) ,12) ) ,7) ) +transpose(transpose(transpose(((transpose(transpose((shuffle(echo(X,4,6) ) +transpose((echo(transpose(X,4) ,4,6) |(((X|X) |X) +transpose(arpeggio(X) ,7) ) ) ,7) ) ,4) ,-7) +transpose((step((echo(echo(transpose(X,-5) ,4,6) ,4,6) +arpeggio(echo(transpose((X|X) ,4) ,4,6) ) ) ,12) +transpose(transpose((transpose(((X+transpose(X,7) ) |arpeggio(X) ) ,-5) +transpose(((X+X) +transpose(shuffle(X) ,12) ) ,-7) ) ,4) ,7) ) ,12) ) |transpose(transpose(transpose(((step(transpose(X,-5) ,12) +transpose(((transpose(X,-5) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) ,7) ) +transpose(transpose(step(step(X,12) ,12) ,-5) ,12) ) ,-5) ,-5) ,-5) ) ,-7) ,-7) ,7) ) ,4) ) +transpose(shuffle(transpose(transpose(step(echo(transpose(X,4) ,4,6) ,12) ,-7) ,4) ) ,7) ) ,4) ) +transpose(transpose(transpose(transpose(transpose(transpose(arpeggio(transpose(((echo(transpose(step(X,12) ,-7) ,4,6) +transpose(shuffle(X) ,4) ) +transpose(transpose(X,-7) ,7) ) ,-7) ) ,4) ,-7) ,4) ,4) ,-5) ,7) ) ,7) ) +transpose(((((step(echo((shuffle(shuffle(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(transpose(transpose(X,4) ,4) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(echo(X,4,6) ,12) ) ) ) +transpose(transpose((((transpose(((transpose(X,-5) +transpose((X|X) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,4) +transpose(((transpose(X,-5) +transpose(step(transpose(X,-5) ,12) ,4) ) +transpose(echo(X,4,6) ,7) ) ,4) ) +transpose(((X+(X|X) ) +transpose(arpeggio((transpose(X,-7) +transpose((X+transpose(X,12) ) ,7) ) ) ,12) ) ,7) ) +(transpose((shuffle(X) +transpose((X|X) ,7) ) ,-5) +(X|echo(X,4,6) ) ) ) ,-5) ,12) ) ,4,6) ,12) +transpose(((step(((((X+transpose(X,7) ) |(transpose(X,-7) +arpeggio(X) ) ) +transpose(transpose(echo(transpose(((X+transpose(X,7) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ,4,6) ,4) ,7) ) |step(transpose(transpose(transpose(transpose(X,4) ,-5) ,-5) ,-7) ,12) ) ,12) +transpose(transpose((((((X+X) +transpose(X,7) ) |((X+transpose(transpose(X,4) ,4) ) +transpose((X|X) ,7) ) ) +transpose((transpose(X,-7) |X) ,-5) ) +(echo(echo(X,4,6) ,4,6) |X) ) ,-5) ,4) ) +transpose(transpose((arpeggio((((X+transpose(X,7) ) |(X|(X|X) ) ) |transpose((X+transpose(transpose(X,-7) ,7) ) ,-7) ) ) +transpose(shuffle(transpose(step((transpose(X,-7) +(X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,12) ,-5) ) ,7) ) ,-7) ,7) ) ,4) ) +transpose(arpeggio(transpose((((echo(echo(X,4,6) ,4,6) +transpose(((echo(X,4,6) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(shuffle(X) ,4) ,7) ) ,12) ) +transpose((transpose(X,-7) |((X+transpose(X,7) ) |transpose(X,-5) ) ) ,12) ) |((((((X+transpose(X,7) ) +transpose(X,12) ) +transpose(X,4) ) +transpose((X|X) ,7) ) +(step(echo(X,4,6) ,12) |(X+transpose(X,12) ) ) ) +transpose((transpose(echo(X,4,6) ,-5) +transpose((((transpose(X,-5) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,4) ,7) ) |step(arpeggio(X) ,12) ) ,7) ) ,7) ) ) ,4) ) ,7) ) +transpose((arpeggio(step(step((X+transpose(arpeggio(X) ,12) ) ,12) ,12) ) +transpose(transpose((X+transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ,12) ) ,-5) ,12) ) ,12) ) |(transpose((echo(step(step(((transpose(transpose(((transpose(X,-5) +transpose((X|X) ,12) ) +transpose(((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,12) ) ,-7) ,4) +transpose(shuffle((step(echo(X,4,6) ,12) |step((X+X) ,12) ) ) ,4) ) +transpose(step(((step(step(arpeggio(X) ,12) ,12) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,12) ,7) ) ,12) ,12) ,4,6) |((((transpose(arpeggio(transpose(X,-5) ) ,-5) |((echo(transpose(((((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(X,4) ) +transpose((X|transpose(X,-7) ) ,7) ) ,-5) ,4,6) +transpose(shuffle(shuffle((((X+transpose(X,4) ) +transpose(X,7) ) +X) ) ) ,4) ) +transpose(echo(((((X+transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) |transpose(shuffle(X) ,-7) ) ,4,6) ,7) ) ) +transpose(transpose(transpose(step(arpeggio((transpose(transpose(X,4) ,4) +X) ) ,12) ,-5) ,-5) ,12) ) +transpose(echo(((transpose(step(((X+X) +transpose(step(X,12) ,12) ) ,12) ,4) |(step(((transpose(X,-5) |(X|X) ) |(X+transpose(X,7) ) ) ,12) |echo(transpose(transpose(X,4) ,4) ,4,6) ) ) |step((transpose(X,-5) +transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,7) ) ,12) ) ,4,6) ,7) ) +transpose(((step(echo(((transpose(transpose(((step(X,12) +transpose(transpose(transpose(X,-7) ,-5) ,4) ) +transpose(step(X,12) ,7) ) ,4) ,-7) +transpose(((transpose(shuffle(((transpose(X,4) +transpose(X,4) ) +transpose(echo(X,4,6) ,7) ) ) ,-7) |transpose(transpose(X,-7) ,-5) ) +transpose(transpose(transpose((step(X,12) +transpose(X,12) ) ,-5) ,4) ,12) ) ,4) ) +transpose((step((transpose(transpose(arpeggio(X) ,-7) ,4) |(X+transpose(X,7) ) ) ,12) +transpose(echo(step((X+transpose(X,7) ) ,12) ,4,6) ,7) ) ,7) ) ,4,6) ,12) +transpose(((step((arpeggio(transpose((X+transpose(X,12) ) ,-5) ) |(X+transpose(X,12) ) ) ,12) +transpose(echo((transpose(transpose(arpeggio(((X+transpose(shuffle(X) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ,4) ,4) |(transpose(arpeggio(shuffle(echo(X,4,6) ) ) ,4) +transpose(transpose((arpeggio(X) |echo(X,4,6) ) ,-7) ,12) ) ) ,4,6) ,4) ) +transpose(transpose(step(transpose((arpeggio(X) |(X+transpose(X,7) ) ) ,4) ,12) ,-5) ,7) ) ,4) ) +transpose(transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,-7) ,-7) ,7) ) ,7) ) ) ,-5) |echo((shuffle(transpose(transpose((X+transpose(X,12) ) ,-5) ,4) ) |transpose(((((X+transpose(X,7) ) +X) |shuffle((X+transpose(X,12) ) ) ) +transpose(X,7) ) ,-7) ) ,4,6) ) ) ,4) ) ) +transpose(transpose((transpose((arpeggio(echo(((X+transpose(X,12) ) +transpose((transpose(X,-5) |shuffle(X) ) ,12) ) ,4,6) ) +transpose((transpose((X+transpose(X,7) ) ,-5) +transpose((step(transpose(X,4) ,12) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) ,7) ) ,-5) +transpose((arpeggio(transpose((transpose(transpose(transpose(X,4) ,-7) ,4) +(((transpose(step(X,12) ,-7) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) +transpose(((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(X,7) ) |echo(echo(X,4,6) ,4,6) ) ,4) ) +transpose((((shuffle(X) +transpose(X,7) ) +transpose((X|X) ,4) ) +transpose(transpose((X+transpose(X,12) ) ,-5) ,7) ) ,7) ) ) ,-7) ) +transpose(transpose(transpose(transpose(transpose(X,-7) ,-5) ,-5) ,4) ,4) ) ,12) ) ,-5) ,4) )
random seed used was 0

NOTE: Generated phrase was too large ( 5664 ) , it has been truncated at 5000 notes.


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