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: Randomize seed: Generations: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Phrase for X: Basic 1 - c,e,gBasic 2 - c,g,e,b-Basic 3 - c,gBasic 4 - cBasic 5 - co3,co4,co3,co2Chord 1 - c e gChord 2 - c e- gChord 3 - c e- g b-Chord 4 - c f gFile 1 - bachinv1.midFile 2 - bachinv2.midFile 3 - bachinv3.midFile 4 - bachinv4.midFile 5 - bachinv5.midFile 6 - bachinv6.midFile 7 - bachinv7.midFile 8 - bachinv8.mid # of Tracks: 1234 Randomize patches: noyes Results may not appear for a few seconds.Be patient!
 Do you like this result? Do you want to let other people listen to it? Save this one in theTune Trove! See what's alreadyin the Tune Trove!

 After 20 generations the expression "X" became this: ((echo(((transpose(((((echo(((shuffle(step(X,12) ) +(((X+step(X,12) ) +transpose(X,4) ) +transpose((transpose(X,4) |transpose(transpose(X,4) ,-5) ) ,7) ) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,4,6) +transpose(transpose((shuffle((X|X) ) +transpose((X+transpose(X,12) ) ,4) ) ,-7) ,4) ) +transpose(shuffle(((X+transpose((((X+transpose(X,4) ) +transpose(X,7) ) +(X+X) ) ,4) ) +transpose((X+X) ,7) ) ) ,7) ) +transpose(transpose((transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X|transpose(X,4) ) ,4) ) +transpose((transpose(step((X+X) ,12) ,-5) |((X+transpose(X,12) ) +transpose(X,12) ) ) ,7) ) ,-7) +transpose(arpeggio((transpose(X,-5) +transpose((step(X,12) +X) ,7) ) ) ,-7) ) ,4) ,4) ) +transpose(transpose(transpose((((X+transpose(X,7) ) +((X+transpose(X,12) ) +echo(X,4,6) ) ) +arpeggio(((transpose(X,4) |transpose(X,-5) ) +transpose((X+transpose(X,7) ) ,7) ) ) ) ,-5) ,-5) ,7) ) ,-7) +transpose((((transpose((shuffle(arpeggio(step((((((X|X) +((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(step(X,12) ,4) ) +transpose(X,7) ) +(transpose((X|X) ,-5) +(transpose(X,-5) +transpose((X+transpose(X,7) ) ,7) ) ) ) ,12) ) ) |((X|(X+X) ) +transpose(arpeggio((transpose((X+X) ,4) |(shuffle(X) |transpose(X,-5) ) ) ) ,12) ) ) ,-7) |arpeggio(transpose(transpose(shuffle(echo(X,4,6) ) ,4) ,-5) ) ) +transpose(transpose((transpose((step(echo(X,4,6) ,12) |transpose((X+transpose(X,12) ) ,-5) ) ,-5) |(((transpose(transpose((step(transpose(X,4) ,12) +transpose(transpose(X,4) ,7) ) ,-7) ,4) +transpose(((echo((X|X) ,4,6) |(X|step(X,12) ) ) +shuffle((((X+transpose(X,4) ) +transpose(X,7) ) +(X+transpose(X,12) ) ) ) ) ,7) ) +transpose(transpose(((X+transpose(echo(transpose(transpose(X,4) ,-7) ,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ,4) ) +transpose(transpose((transpose(transpose(arpeggio(X) ,-5) ,4) |step(step(X,12) ,12) ) ,-7) ,7) ) ) ,-7) ,4) ) +transpose(((transpose(transpose(transpose(transpose(transpose(shuffle(X) ,-7) ,-7) ,-5) ,4) ,-5) +transpose(transpose(transpose((step(X,12) +((X+transpose(X,7) ) |transpose((X+X) ,-7) ) ) ,-7) ,-7) ,7) ) +transpose(transpose(arpeggio((shuffle(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) +transpose(((arpeggio(X) +transpose((X+transpose(X,12) ) ,12) ) |((X|X) +(X+X) ) ) ,7) ) +transpose(((shuffle(X) +transpose((transpose((X|X) ,-5) |(X|X) ) ,4) ) +transpose((X+transpose(((echo(X,4,6) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,4) ) +transpose(transpose(transpose((X+X) ,-7) ,4) ,7) ) ) |((X+transpose(X,12) ) +(transpose(transpose(X,-7) ,4) +transpose((arpeggio(X) +transpose(X,4) ) ,12) ) ) ) ) ,-5) ,7) ) ,7) ) ,4) ) +transpose(((((transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,12) ) +transpose((transpose(X,-5) +transpose(X,4) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) +transpose(((echo((((shuffle(X) |transpose(X,-7) ) +transpose((((shuffle(X) +X) +transpose(X,4) ) +transpose(((X+transpose(transpose(X,4) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,7) ) ,7) ) |step((transpose(transpose(X,-5) ,4) +transpose(transpose(X,-7) ,12) ) ,12) ) ,4,6) +transpose((shuffle(((echo(X,4,6) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ) |(X+transpose(X,12) ) ) ,4) ) +transpose(step((arpeggio(X) |X) ,12) ,7) ) ,12) ) +(((transpose(shuffle(transpose((X|X) ,4) ) ,-7) +(((X+transpose(X,12) ) +transpose(transpose(X,-5) ,12) ) +((((transpose(X,-5) |(X+X) ) +transpose(shuffle(X) ,7) ) +transpose(((transpose(X,-5) +transpose(shuffle(transpose(X,-7) ) ,4) ) +transpose(echo(X,4,6) ,7) ) ,4) ) +transpose(((transpose(X,-7) +transpose(transpose(X,4) ,4) ) +transpose(echo(X,4,6) ,7) ) ,7) ) ) ) +transpose(echo(transpose((X+transpose(X,7) ) ,-7) ,4,6) ,7) ) |arpeggio((transpose(shuffle(echo(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,4,6) ) ,-7) +(step((transpose(X,-5) +(X+X) ) ,12) +transpose(transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) +transpose(transpose((X+transpose(X,12) ) ,-7) ,12) ) ,4) ,12) ) ) ) ) ) |transpose((transpose(arpeggio(arpeggio(arpeggio(transpose(step(X,12) ,4) ) ) ) ,-7) |step(arpeggio((step((echo(X,4,6) +transpose(X,-5) ) ,12) |(transpose((X|X) ,4) |arpeggio(transpose(X,-5) ) ) ) ) ,12) ) ,-7) ) +transpose(transpose(transpose(arpeggio(((((X+X) +(((X|X) +transpose(echo(X,4,6) ,4) ) +transpose(shuffle(X) ,7) ) ) +transpose(((((X+X) +transpose((transpose(X,4) |X) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(arpeggio(transpose(shuffle(X) ,-5) ) ,7) ) ,-7) ) +transpose((((transpose(transpose((X|X) ,-5) ,4) +transpose(step(X,12) ,12) ) |((transpose(X,4) +transpose(((X|X) +transpose(X,12) ) ,7) ) |echo(((X+transpose(transpose(X,4) ,4) ) +transpose(transpose(X,4) ,7) ) ,4,6) ) ) +(arpeggio(transpose((X|X) ,-5) ) |(echo(X,4,6) |(transpose(X,-5) +transpose((X|X) ,12) ) ) ) ) ,7) ) ) ,-7) ,-7) ,7) ) ,12) ) ,4,6) +transpose((transpose((((transpose(((((X+transpose(X,7) ) |transpose(X,-5) ) +arpeggio(((echo(X,4,6) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ) +((arpeggio(transpose((X|X) ,-5) ) +transpose((echo(X,4,6) +transpose(X,7) ) ,4) ) +transpose(transpose(shuffle(X) ,-7) ,7) ) ) ,-7) +(transpose(transpose(((shuffle(transpose(X,-5) ) +(((X+transpose(transpose(X,-7) ,4) ) +transpose((X|X) ,7) ) |X) ) |transpose(transpose(transpose(echo(transpose(X,-7) ,4,6) ,-5) ,4) ,-5) ) ,-7) ,4) +((((((((((transpose(transpose(arpeggio(X) ,-7) ,-5) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) |(shuffle(X) +transpose(transpose(step(X,12) ,4) ,7) ) ) |echo((((X+X) +transpose(X,7) ) +transpose((transpose(X,4) |arpeggio(X) ) ,12) ) ,4,6) ) +transpose(transpose(shuffle((X+transpose((X+X) ,7) ) ) ,-5) ,4) ) +transpose(transpose(transpose(((X+transpose(transpose(X,-5) ,12) ) |arpeggio(echo(X,4,6) ) ) ,4) ,-5) ,7) ) |(((((X+transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) +(X+transpose(X,12) ) ) |step(step(X,12) ,12) ) +(((((arpeggio(X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) |transpose(transpose(X,-7) ,-5) ) +transpose((((transpose(X,-7) +transpose(X,7) ) +transpose(echo(step(step(X,12) ,12) ,4,6) ,12) ) +transpose((X+transpose(X,12) ) ,12) ) ,4) ) +transpose(((transpose(transpose(X,-7) ,-7) |(X+transpose(arpeggio(X) ,12) ) ) +transpose((transpose(arpeggio(X) ,-5) |transpose((X+transpose(X,7) ) ,4) ) ,7) ) ,7) ) ) ) |transpose(((((X+transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(X,4) ) +transpose((transpose(X,4) +X) ,12) ) ,4) ) +transpose((shuffle(transpose(transpose(transpose(X,4) ,4) ,-5) ) +transpose(shuffle(shuffle(transpose(X,-7) ) ) ,7) ) ,4) ) +transpose(((((transpose(((X+X) |arpeggio(X) ) ,-5) |((X|X) |transpose(X,4) ) ) |(((step(transpose(X,-7) ,12) +transpose(X,-7) ) +transpose(step(shuffle(arpeggio((X+transpose(X,12) ) ) ) ,12) ,4) ) +transpose(echo((((X|step(X,12) ) +transpose((X|X) ,4) ) +transpose(step(shuffle(X) ,12) ,7) ) ,4,6) ,7) ) ) |(((transpose((X|X) ,-7) |transpose(echo(X,4,6) ,-5) ) +transpose(transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) ,7) ) +step(X,12) ) ) +transpose(step(echo(transpose(((transpose(X,4) |(X+step(X,12) ) ) +transpose(X,12) ) ,-5) ,4,6) ,12) ,7) ) ,7) ) ) ) +(transpose(step((transpose(echo(((X+X) +transpose(arpeggio(X) ,12) ) ,4,6) ,4) +((arpeggio(X) +transpose(shuffle(X) ,4) ) +transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,7) ) ) ,12) ,-5) +transpose((transpose(shuffle((((arpeggio(X) |((X|X) +X) ) +transpose(echo(X,4,6) ,12) ) +(step((X|transpose(X,4) ) ,12) +((((X+transpose(X,4) ) +transpose(X,7) ) +arpeggio(X) ) +transpose(echo(X,4,6) ,7) ) ) ) ) ,-7) |(((transpose((transpose(step((X+transpose(X,7) ) ,12) ,-5) |step(transpose(transpose(X,-5) ,-7) ,12) ) ,-7) +transpose(shuffle(transpose(shuffle((X+transpose(X,7) ) ) ,-5) ) ,7) ) +transpose(shuffle((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ) ,4) ) +transpose((step((transpose(transpose(X,-5) ,4) +transpose((step(X,12) |echo(step(X,12) ,4,6) ) ,7) ) ,12) +arpeggio(((arpeggio(X) +X) +transpose(X,4) ) ) ) ,7) ) ) ,7) ) ) +transpose(transpose(shuffle(transpose((shuffle(X) +transpose(X,7) ) ,4) ) ,4) ,-5) ) ,-7) +((((transpose((transpose((((step((echo(X,4,6) +((X+X) +X) ) ,12) +transpose(transpose((arpeggio(X) +transpose((X|X) ,12) ) ,-5) ,4) ) +transpose(step(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ,4) ,12) ,12) ) +transpose((shuffle(step(transpose((X|X) ,4) ,12) ) +transpose(transpose((transpose((X+X) ,4) |((echo((X+X) ,4,6) +transpose(X,4) ) +transpose((arpeggio(X) +transpose(X,7) ) ,7) ) ) ,4) ,12) ) ,12) ) ,-5) +transpose((shuffle((transpose(transpose(((transpose((X+X) ,-7) +transpose(transpose((arpeggio(X) +transpose((X|X) ,12) ) ,-5) ,7) ) +transpose((X+transpose((X+transpose(X,7) ) ,12) ) ,-5) ) ,4) ,4) +(((transpose(X,-7) +echo((X+transpose(X,7) ) ,4,6) ) +step(transpose((X|X) ,-7) ,12) ) +transpose((echo(transpose(X,4) ,4,6) +transpose((shuffle(X) +transpose((X+X) ,12) ) ,4) ) ,7) ) ) ) +echo((((shuffle((X+transpose(X,12) ) ) +echo(((transpose(X,-5) +transpose(X,12) ) +echo(transpose(X,-7) ,4,6) ) ,4,6) ) +transpose(((transpose(X,-5) +transpose(shuffle(transpose(X,-7) ) ,4) ) |(X+transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ) ,4) ) +transpose((transpose(X,-5) +((echo(X,4,6) +transpose(transpose(X,-7) ,12) ) |(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,12) ) ) ) ,7) ) ,4,6) ) ,7) ) ,4) +transpose(transpose((step(arpeggio(((((X+transpose(((X+transpose(X,12) ) +transpose(X,12) ) ,12) ) +transpose(X,4) ) +transpose((X+X) ,-5) ) +transpose(transpose(echo(shuffle(transpose(X,-7) ) ,4,6) ,-5) ,7) ) ) ,12) +transpose((((transpose(transpose(((transpose((X+echo(X,4,6) ) ,-5) +transpose(arpeggio((X|arpeggio(X) ) ) ,7) ) |echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) ) ,-7) ,-5) |((step((((X+transpose(X,4) ) +transpose(X,7) ) |arpeggio(transpose(X,-7) ) ) ,12) +transpose(echo(transpose(transpose(echo(transpose(shuffle(X) ,-7) ,4,6) ,-7) ,-5) ,4,6) ,4) ) +transpose(transpose((transpose(step(shuffle(X) ,12) ,-7) |(((X+(X+transpose(X,12) ) ) +transpose(X,7) ) +transpose(transpose(shuffle(X) ,-5) ,12) ) ) ,-5) ,7) ) ) |echo(echo((((X+transpose(X,4) ) +transpose(X,7) ) |((X|step(step(X,12) ,12) ) |transpose((X+transpose(X,12) ) ,-7) ) ) ,4,6) ,4,6) ) +step(transpose(step(arpeggio(((transpose((transpose(echo(X,4,6) ,-5) +step(X,12) ) ,-7) +transpose((transpose(X,-7) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) +(transpose((echo(X,4,6) +transpose(arpeggio(X) ,7) ) ,-7) +transpose(step(X,12) ,7) ) ) ) ,12) ,-7) ,12) ) ,7) ) ,-7) ,4) ) +transpose(shuffle((step((transpose(transpose((arpeggio(transpose((X+transpose(X,12) ) ,-7) ) +((X|X) |X) ) ,-7) ,-7) +transpose((step((transpose(transpose(X,4) ,-5) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ) ,12) |transpose(step(X,12) ,-7) ) ,7) ) ,12) +transpose(transpose((transpose(arpeggio((X+(X+X) ) ) ,4) +transpose(shuffle(echo(((X|X) +transpose((echo(transpose(X,-7) ,4,6) +transpose(transpose(X,-5) ,7) ) ,12) ) ,4,6) ) ,7) ) ,4) ,7) ) ) ,7) ) +transpose(transpose((transpose((shuffle(((transpose(((X+transpose(X,12) ) |X) ,-5) +transpose(transpose(transpose(X,-7) ,-7) ,4) ) +transpose((arpeggio(X) +(transpose(X,4) |transpose(X,-7) ) ) ,7) ) ) +transpose(transpose(echo(echo(transpose(X,-5) ,4,6) ,4,6) ,-5) ,12) ) ,-7) |transpose(((transpose(((step(((X+transpose(X,12) ) +transpose((X+X) ,12) ) ,12) +transpose((echo(arpeggio(X) ,4,6) |(transpose(arpeggio(X) ,-7) +(transpose(X,4) +transpose(X,12) ) ) ) ,7) ) +transpose((transpose(transpose(X,-5) ,-5) |(shuffle(X) +transpose((X|X) ,4) ) ) ,7) ) ,-5) +transpose(echo((((((X+X) +transpose((X+transpose(X,7) ) ,4) ) +transpose((X+X) ,7) ) |transpose(arpeggio((X+transpose(X,12) ) ) ,-7) ) |transpose(transpose(arpeggio(X) ,-5) ,4) ) ,4,6) ,12) ) +transpose(((step(echo(((transpose((X|X) ,4) +transpose((transpose(X,-5) |X) ,4) ) +transpose(echo((X+X) ,4,6) ,7) ) ,4,6) ,12) +((transpose(X,-5) +transpose(transpose(transpose(X,4) ,4) ,12) ) +(transpose(echo(X,4,6) ,-5) |transpose(transpose(X,-5) ,4) ) ) ) |(transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose((X|transpose(X,4) ) ,7) ) ,-5) +transpose(transpose((transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) |((X+X) +(X|X) ) ) ,4) +transpose(shuffle((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) +transpose(((X|X) +X) ,7) ) ) ,7) ) ,-5) ,12) ) ) ,12) ) ,4) ) ,-5) ,4) ) +transpose(step(transpose(((transpose(((transpose((shuffle(transpose(X,4) ) +(transpose(X,-5) +transpose(X,12) ) ) ,-7) +transpose(echo(((transpose(X,4) +echo(echo(X,4,6) ,4,6) ) +((transpose(X,4) +transpose(X,12) ) +transpose(X,12) ) ) ,4,6) ,4) ) +transpose((transpose(shuffle(arpeggio(X) ) ,-5) +(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) |((transpose((X+transpose(X,7) ) ,-7) |X) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose((X+X) ,7) ) ) ) ) ,7) ) ,4) +transpose(((((shuffle(step((X+X) ,12) ) +transpose(shuffle(shuffle(transpose(transpose(X,-5) ,4) ) ) ,4) ) +transpose(transpose((transpose((step(X,12) +transpose(X,7) ) ,4) |transpose((((X|X) +X) +transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) ) ,-5) ,7) ) |transpose(transpose(transpose(((X+X) +transpose(X,12) ) ,4) ,-7) ,-7) ) +transpose(shuffle((transpose(transpose(transpose(transpose(arpeggio(X) ,-7) ,-5) ,-7) ,4) +transpose((transpose(shuffle(((step((X+transpose(X,7) ) ,12) +transpose((X|X) ,4) ) +transpose(((shuffle(X) |(X+X) ) +shuffle(arpeggio(X) ) ) ,7) ) ) ,4) |(step(echo(X,4,6) ,12) +(((((X+X) +X) +X) +transpose(echo((transpose(X,-7) +transpose(transpose(X,4) ,7) ) ,4,6) ,4) ) +transpose(((transpose((X+transpose(X,12) ) ,-5) +transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) +(X+transpose((X|transpose(X,-5) ) ,7) ) ) ,7) ) ) ) ,7) ) ) ,7) ) ,4) ) +transpose(transpose(transpose(echo((((X|(X+transpose(transpose(X,-7) ,7) ) ) +transpose(transpose((X+X) ,4) ,4) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) |X) +transpose(X,4) ) |(((X+X) +echo(X,4,6) ) +transpose(echo(X,4,6) ,-7) ) ) ,7) ) ,4,6) ,-7) ,-5) ,7) ) ,-7) ,12) ,7) ) ) ,12) ) |(transpose((transpose(transpose(transpose((transpose(shuffle(echo(X,4,6) ) ,-7) |X) ,-5) ,-5) ,-5) +transpose((((((((step(transpose(((X+transpose(X,12) ) +transpose(X,-5) ) ,-7) ,12) +transpose(step(transpose(transpose((X|X) ,4) ,-5) ,12) ,12) ) |echo((transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,-5) +transpose((transpose(echo(shuffle(X) ,4,6) ,4) |(transpose(transpose(X,-5) ,-7) |(transpose(X,-5) |(X+transpose(X,12) ) ) ) ) ,7) ) ,4,6) ) |((transpose((echo(transpose(X,-7) ,4,6) +transpose(transpose(X,4) ,-5) ) ,-7) +transpose((transpose(X,-5) +transpose(transpose(X,-7) ,12) ) ,-5) ) +shuffle((transpose((step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) +transpose(transpose(shuffle(X) ,4) ,7) ) ,4) +transpose(step((X|(X+X) ) ,12) ,12) ) ) ) ) +transpose(transpose((arpeggio(echo((((X+X) |step(X,12) ) +step(X,12) ) ,4,6) ) |transpose(echo(transpose(((X+transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-7) ,4,6) ,4) ) ,4) ,7) ) +(shuffle(((((transpose(X,-7) +transpose(transpose(X,-5) ,12) ) |((echo(echo(X,4,6) ,4,6) +transpose(transpose(transpose(X,4) ,4) ,4) ) +transpose(transpose(X,4) ,7) ) ) +(((arpeggio(echo((X+transpose(X,12) ) ,4,6) ) +transpose(((X+transpose(X,4) ) +transpose(arpeggio(X) ,7) ) ,4) ) +transpose(((transpose(X,-5) |transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose(shuffle(shuffle(X) ) ,-7) ) ) |step(step(transpose(X,-7) ,12) ,12) ) ) +transpose((transpose(arpeggio(transpose(transpose((((X|(step(X,12) +X) ) +transpose(shuffle(X) ,4) ) +transpose((X+X) ,7) ) ,-5) ,-7) ) ,-5) +((transpose(transpose((transpose(X,-5) +transpose(X,7) ) ,4) ,-7) |transpose(step(echo(X,4,6) ,12) ,4) ) +transpose(transpose(arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,12) ) ) ,4) ,-5) ) ) ,12) ) ) +transpose(((transpose((transpose(transpose(((X+transpose(X,12) ) +transpose(step(X,12) ,12) ) ,-5) ,-7) +((((((X+transpose(X,7) ) +transpose(X,12) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(((X+X) +X) ,7) ) ,4) ) +transpose(shuffle(((X+transpose(X,7) ) +X) ) ,7) ) +transpose(transpose(transpose(transpose(X,-5) ,-7) ,-7) ,-7) ) +((shuffle(transpose(X,4) ) +transpose(((transpose(X,-5) |arpeggio(X) ) |transpose((X|X) ,4) ) ,7) ) +transpose((transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-5) +transpose(((shuffle(X) +transpose(transpose(X,-7) ,7) ) +step((transpose(X,-7) +X) ,12) ) ,12) ) ,12) ) ) ) ,4) +transpose((((arpeggio((X|X) ) |((transpose(transpose(X,-7) ,4) +transpose(transpose(echo((X|X) ,4,6) ,4) ,4) ) +transpose((transpose(X,4) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ) |((arpeggio(((X|X) +((X+transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(X) ,7) ) ) ) +transpose((echo((transpose(X,-5) |(transpose(X,4) +shuffle(X) ) ) ,4,6) +transpose(shuffle(transpose(X,4) ) ,12) ) ,4) ) +transpose(((shuffle((transpose(X,4) +(X+transpose(X,12) ) ) ) +echo((X|X) ,4,6) ) +transpose(((shuffle(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |X) ,7) ) ,7) ) ) +transpose((echo((transpose((X+(X|X) ) ,-7) +transpose((X+X) ,12) ) ,4,6) +transpose(((transpose(transpose(X,-5) ,-5) +transpose(echo(echo(X,4,6) ,4,6) ,7) ) +transpose(step((X+transpose(shuffle(X) ,7) ) ,12) ,12) ) ,12) ) ,4) ) ,4) ) +transpose(((transpose(echo(transpose(transpose((transpose((X+X) ,-7) |X) ,-7) ,4) ,4,6) ,-7) +transpose((transpose((transpose((echo((X+transpose((X+X) ,7) ) ,4,6) +transpose(((X+(X+X) ) |(X|transpose(X,4) ) ) ,12) ) ,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ) ,-7) +transpose(arpeggio(transpose(transpose(transpose(arpeggio(X) ,-5) ,-5) ,4) ) ,12) ) ,4) ) +transpose((shuffle((((X+echo(X,4,6) ) |((X+X) +transpose(X,12) ) ) |echo(((X|X) +X) ,4,6) ) ) |transpose(((echo(transpose(X,-5) ,4,6) |X) +transpose((((step(X,12) +(X+transpose(X,12) ) ) |X) +transpose(transpose((X+X) ,-5) ,7) ) ,7) ) ,4) ) ,7) ) ,7) ) ,4) ) +transpose(transpose((arpeggio(transpose(((transpose(X,-7) +transpose(X,-7) ) +(((X+transpose(X,12) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) +X) ) ,-7) ) |transpose(((transpose(transpose(X,4) ,-5) +transpose(transpose(echo((X+X) ,4,6) ,-5) ,4) ) +transpose(transpose(echo(transpose(X,-5) ,4,6) ,-5) ,7) ) ,4) ) ,-7) ,7) ) ,7) ) ,4) +((transpose(step((transpose(echo((transpose(transpose((((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) |X) +transpose(arpeggio(X) ,4) ) |echo(transpose(X,4) ,4,6) ) ,-5) ,-5) +(echo((((step(transpose(X,4) ,12) +transpose((X|X) ,4) ) +transpose(((X|transpose(X,-7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) +((X|(X|X) ) +transpose(transpose(X,-7) ,7) ) ) ,4,6) +transpose(transpose((shuffle((X+shuffle(X) ) ) +(arpeggio(transpose(X,4) ) +transpose((X+transpose((X+(X+transpose(X,7) ) ) ,12) ) ,7) ) ) ,-5) ,12) ) ) ,4,6) ,-5) +transpose((((transpose(transpose(X,-7) ,4) +arpeggio(transpose(transpose(((X+transpose(X,7) ) +transpose(transpose(X,4) ,12) ) ,-7) ,-7) ) ) +transpose(echo(step(arpeggio((((X|X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ,12) ,4,6) ,12) ) +transpose((step(((step((X+X) ,12) |(X+transpose(X,7) ) ) +transpose((shuffle((X+X) ) +transpose(arpeggio((X|X) ) ,7) ) ,12) ) ,12) |shuffle(transpose(transpose(transpose((((X+X) +transpose((X+X) ,12) ) +transpose(X,12) ) ,4) ,-7) ,4) ) ) ,7) ) ,12) ) ,12) ,-7) |step((((step((((transpose(shuffle(((arpeggio(X) +transpose(X,4) ) +transpose(transpose(step(X,12) ,-5) ,12) ) ) ,4) +transpose(transpose((transpose(X,-5) +step(X,12) ) ,4) ,4) ) +transpose(transpose(echo(X,4,6) ,4) ,7) ) |transpose((X+transpose(transpose(X,-7) ,7) ) ,-5) ) ,12) +transpose(((((shuffle(((X+X) +(X+(X+transpose(X,7) ) ) ) ) +transpose(((((X+transpose(X,7) ) |transpose(transpose(X,-7) ,-7) ) +transpose((echo((X+transpose(transpose(X,-5) ,7) ) ,4,6) +transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) ,4) ) +transpose(transpose(((transpose(X,4) +transpose(echo(transpose(X,4) ,4,6) ,4) ) +transpose((X|(X+X) ) ,7) ) ,4) ,7) ) ,7) ) +transpose(transpose(transpose(transpose(step(X,12) ,-5) ,4) ,4) ,12) ) |((((transpose((X+transpose(X,7) ) ,-7) |(((X+transpose(step(X,12) ,4) ) +transpose(X,7) ) |transpose(X,-5) ) ) +(step(((X+transpose(X,12) ) +(X|X) ) ,12) +transpose(transpose((((X+transpose(X,12) ) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ,4) ,7) ) ) +transpose(arpeggio(transpose(transpose(X,4) ,4) ) ,4) ) +transpose((arpeggio(X) |(((X+transpose(X,4) ) +transpose(X,7) ) |arpeggio(X) ) ) ,7) ) ) +transpose(step(transpose((arpeggio(X) +transpose(transpose(X,-7) ,12) ) ,-5) ,12) ,12) ) ,7) ) +(transpose(transpose(shuffle((((X+transpose((X+X) ,12) ) +arpeggio(transpose(X,-5) ) ) +transpose(echo(arpeggio((X+transpose(X,12) ) ) ,4,6) ,4) ) ) ,-7) ,4) +shuffle((arpeggio(((X+transpose(transpose(transpose(X,-7) ,-5) ,4) ) +transpose(((transpose(X,4) +transpose(echo(X,4,6) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) ) |echo(shuffle(shuffle((X|X) ) ) ,4,6) ) ) ) ) |transpose((arpeggio(transpose(X,4) ) +transpose((((arpeggio(transpose(transpose(transpose((X+transpose(X,12) ) ,4) ,-7) ,-7) ) |shuffle(arpeggio(transpose(transpose(shuffle(X) ,-5) ,-5) ) ) ) +transpose(transpose(((transpose(((X|X) +transpose(shuffle(X) ,7) ) ,4) +transpose(echo(arpeggio((X|X) ) ,4,6) ,4) ) +transpose((arpeggio(X) +((transpose(X,-5) +transpose(transpose((X+X) ,4) ,4) ) +transpose((transpose(X,-5) |arpeggio(X) ) ,7) ) ) ,7) ) ,-7) ,4) ) +transpose((arpeggio(transpose(transpose((X+transpose(X,7) ) ,-5) ,-7) ) +echo((((X+transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(arpeggio(X) ) ,7) ) ,4,6) ) ,7) ) ,7) ) ,-7) ) ,12) ) |(transpose((shuffle(shuffle((transpose(transpose(transpose(((transpose(X,-5) +transpose((arpeggio(X) +transpose((transpose(X,-7) +X) ,12) ) ,4) ) +transpose((((X+transpose(X,7) ) +transpose(X,7) ) +((X+transpose(X,12) ) |shuffle(X) ) ) ,7) ) ,4) ,-5) ,-5) +echo(echo(transpose((transpose(X,-7) |((transpose(X,-7) |X) +transpose(step(shuffle(X) ,12) ,7) ) ) ,-5) ,4,6) ,4,6) ) ) ) +transpose(((step((echo(X,4,6) |transpose(arpeggio(X) ,4) ) ,12) +transpose(shuffle(((arpeggio((step(X,12) +transpose(X,12) ) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +X) +transpose(arpeggio(X) ,12) ) ,4) ) +transpose(transpose(step((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,12) ,-5) ,7) ) ) ,7) ) +transpose(((arpeggio(transpose(transpose((transpose(X,4) +transpose(X,7) ) ,4) ,-7) ) +transpose(((((X+transpose(transpose(X,4) ,7) ) +transpose((X|echo(X,4,6) ) ,4) ) +transpose(arpeggio(shuffle(transpose(X,-5) ) ) ,7) ) +transpose((((transpose((X+X) ,-5) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ) +((transpose(X,-5) +transpose(echo(X,4,6) ,4) ) +transpose(((transpose(X,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(arpeggio(X) ,7) ) ,7) ) ) +(((X+X) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ) ,7) ) ,4) ) +transpose(((X|X) +echo((X|transpose(X,-7) ) ,4,6) ) ,7) ) ,-7) ) ,12) ) ,-5) +(transpose((((transpose(transpose((((transpose(((transpose(X,-7) |transpose(step(X,12) ,-7) ) +transpose(transpose(shuffle((X|X) ) ,-7) ,12) ) ,4) +transpose(transpose((((step(((echo(X,4,6) +transpose(X,4) ) +transpose((X|X) ,7) ) ,12) +transpose(arpeggio((X+transpose(X,12) ) ) ,12) ) +transpose((shuffle(shuffle(X) ) |echo((X+X) ,4,6) ) ,4) ) +transpose(step(transpose(X,-5) ,12) ,7) ) ,-7) ,7) ) +transpose(((step((echo((X+transpose(X,7) ) ,4,6) |X) ,12) |((arpeggio((transpose(X,4) +(X+transpose(X,12) ) ) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) ,7) ) +transpose(transpose(X,-7) ,-5) ) ) +(((transpose(X,-5) |arpeggio(X) ) +transpose((X|X) ,-5) ) |((((X|X) +transpose(X,-5) ) +(((X|X) +transpose(X,12) ) |transpose((X+transpose(X,7) ) ,4) ) ) |((transpose((X+X) ,-7) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(transpose(X,4) ,4) ,7) ) ) ) ) ,4) ) +transpose((transpose((transpose(X,4) +transpose((transpose(X,4) |X) ,7) ) ,-5) |((transpose(X,4) +transpose(transpose(X,-5) ,7) ) |X) ) ,7) ) ,-7) ,-7) +transpose((transpose(((((X+(X+transpose(X,12) ) ) +echo(X,4,6) ) +transpose(((arpeggio(X) +shuffle(X) ) +(X|transpose(X,-7) ) ) ,4) ) +transpose(((X+transpose(transpose(X,4) ,4) ) +transpose(step(X,12) ,7) ) ,7) ) ,-5) +transpose(step(arpeggio(transpose((X+X) ,-5) ) ,12) ,7) ) ,4) ) +transpose((transpose(transpose(transpose(transpose((transpose(X,-5) +(X+X) ) ,-5) ,4) ,-7) ,4) +transpose((shuffle((((transpose(X,-5) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ) |transpose((transpose((X|X) ,-5) +transpose(((X+X) |X) ,12) ) ,4) ) |((X|X) |transpose(((transpose(((X|X) +transpose(X,7) ) ,4) +transpose((arpeggio(X) |transpose(X,4) ) ,4) ) +transpose((arpeggio(X) +shuffle(X) ) ,7) ) ,4) ) ) ) +transpose(transpose(((((transpose((X+transpose(X,12) ) ,4) +transpose(transpose(echo((X+X) ,4,6) ,-7) ,4) ) +transpose(((transpose(X,-7) |transpose(X,4) ) +(((X+transpose(X,12) ) +transpose(transpose(X,-5) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ,7) ) +transpose(shuffle(((((X+X) +transpose(transpose(X,4) ,12) ) +X) +(transpose(X,-7) |(X+X) ) ) ) ,4) ) +transpose(((transpose((((X+transpose(shuffle(X) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) |shuffle((X|X) ) ) ,4) +transpose((transpose(transpose(X,-5) ,4) +((step(X,12) +shuffle((X+transpose(X,7) ) ) ) |step((X|X) ,12) ) ) ,4) ) +transpose(shuffle((transpose((X|X) ,-5) |transpose(X,-5) ) ) ,7) ) ,7) ) ,4) ,7) ) ,7) ) ,4) ) +transpose(transpose(transpose((transpose(echo(transpose(transpose(transpose((((X|X) +transpose(arpeggio(X) ,12) ) |((X|X) +transpose(transpose(X,4) ,7) ) ) ,4) ,-7) ,-5) ,4,6) ,4) +transpose((X+transpose(X,12) ) ,4) ) ,-5) ,4) ,7) ) ,-7) +transpose((((((arpeggio(transpose((transpose(echo(step(transpose(transpose(X,4) ,4) ,12) ,4,6) ,-7) +transpose(transpose(transpose(arpeggio(transpose((X+transpose(X,7) ) ,-5) ) ,4) ,-5) ,12) ) ,-5) ) +transpose(shuffle((step(transpose(echo(X,4,6) ,-5) ,12) +((step(X,12) |(transpose(X,-5) |(X|transpose(X,-7) ) ) ) +(arpeggio(step((X|X) ,12) ) +transpose(((transpose(X,4) +transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,12) ) ) ) ) ,4) ) +transpose(echo(transpose(transpose((X+transpose(X,12) ) ,-5) ,-5) ,4,6) ,7) ) +transpose((arpeggio(((echo(arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,7) ) ) ,4,6) +transpose(step((((arpeggio(X) |(X+transpose(X,12) ) ) +step(((X|X) +transpose(arpeggio(X) ,7) ) ,12) ) +(step(transpose(X,-7) ,12) +((X+X) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ) ) ,12) ,7) ) +transpose(echo(arpeggio((arpeggio((transpose(X,-7) +X) ) |(echo(X,4,6) +transpose(X,12) ) ) ) ,4,6) ,7) ) ) |((transpose((transpose(X,4) +(X+transpose(X,7) ) ) ,4) +((transpose((arpeggio(transpose(X,4) ) +transpose(X,4) ) ,-7) +transpose(shuffle(transpose((X+transpose((X+transpose(X,12) ) ,12) ) ,-5) ) ,4) ) +transpose(((X+transpose(X,12) ) +transpose(echo(X,4,6) ,-5) ) ,7) ) ) |(step(X,12) |(shuffle(transpose((transpose((X+transpose(X,12) ) ,-7) +(transpose(X,-5) +(X+X) ) ) ,-5) ) |((transpose(X,4) +transpose(X,4) ) +transpose((X+transpose(transpose(arpeggio(X) ,-5) ,7) ) ,7) ) ) ) ) ) ,4) ) +transpose(transpose((transpose(transpose((arpeggio(X) +(X+X) ) ,4) ,4) +(transpose((transpose(X,4) +transpose((transpose(X,4) +transpose((X|(X+transpose(X,12) ) ) ,7) ) ,12) ) ,4) |((X+transpose(X,12) ) +arpeggio(X) ) ) ) ,-5) ,7) ) +((((((echo(((transpose(X,-7) +transpose(step(X,12) ,12) ) +transpose(arpeggio(transpose(X,-7) ) ,12) ) ,4,6) +((step(X,12) +transpose(((X|X) +transpose(X,4) ) ,4) ) +transpose(transpose(transpose(X,-5) ,4) ,7) ) ) +transpose((arpeggio(echo(X,4,6) ) +((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ,-7) ) +transpose((((echo((X+transpose(X,12) ) ,4,6) +transpose(arpeggio((transpose(X,-7) |transpose((X|X) ,4) ) ) ,12) ) +transpose((arpeggio(echo(X,4,6) ) +transpose(transpose((X|X) ,-7) ,7) ) ,4) ) +transpose(transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) +transpose(arpeggio(X) ,-5) ) ,-5) ,7) ) ,12) ) +transpose(echo(arpeggio((X|X) ) ,4,6) ,-5) ) |echo(transpose(((transpose(arpeggio(transpose(transpose((X|X) ,4) ,-7) ) ,-5) +transpose((transpose((X+(X+X) ) ,4) +transpose((X|(transpose(transpose(X,4) ,4) |transpose(X,4) ) ) ,7) ) ,4) ) +transpose(transpose(((shuffle(transpose(transpose(X,4) ,4) ) +(transpose(X,-5) +transpose(X,7) ) ) +transpose((arpeggio(transpose(X,-5) ) |(transpose(X,-5) +X) ) ,7) ) ,-7) ,7) ) ,-7) ,4,6) ) +transpose(((((((arpeggio(((X|X) |X) ) +transpose(((X+transpose(X,7) ) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(echo(X,4,6) ,-5) ,12) ) ,7) ) +(transpose(step(X,12) ,4) +transpose((transpose(X,4) +(X|X) ) ,-5) ) ) +echo(step((transpose(X,-7) +transpose(((X+X) +shuffle(X) ) ,7) ) ,12) ,4,6) ) |(arpeggio(transpose(X,4) ) |transpose((arpeggio((transpose(X,-7) +step(X,12) ) ) |(X|X) ) ,-7) ) ) |transpose(transpose((step(X,12) |arpeggio(X) ) ,-7) ,4) ) ,12) ) ) ,7) ) ) ) ) ) random seed used was 219502498

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