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!
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 After 20 generations the expression "X" became this: transpose((echo(transpose(((((arpeggio(((transpose(shuffle(transpose((X+transpose(X,12) ) ,-7) ) ,4) +transpose(echo((step(transpose(X,4) ,12) +step(echo((X|X) ,4,6) ,12) ) ,4,6) ,12) ) +transpose(transpose(transpose(transpose(echo(((shuffle(X) +transpose(transpose(transpose((shuffle(X) +X) ,-5) ,4) ,4) ) +transpose((transpose(X,-5) |transpose(shuffle(X) ,-7) ) ,7) ) ,4,6) ,-5) ,4) ,4) ,12) ) ) +transpose(transpose(((transpose(step(echo((transpose(shuffle((X+X) ) ,4) +transpose((transpose(X,4) |transpose(X,4) ) ,12) ) ,4,6) ,12) ,-7) |(transpose(transpose(transpose(transpose(transpose(X,4) ,4) ,-5) ,-7) ,4) +((((X+transpose(X,12) ) +(X+transpose(X,12) ) ) +transpose(transpose(X,-7) ,7) ) +transpose(((X+transpose(X,7) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) ,12) ) ) ) +transpose(echo(((transpose(X,-7) +(X|X) ) +transpose(transpose(transpose(transpose(transpose(X,-7) ,-5) ,-7) ,-7) ,12) ) ,4,6) ,7) ) ,-7) ,4) ) +transpose(echo(((shuffle((echo(transpose(shuffle((X+transpose(X,7) ) ) ,-5) ,4,6) +transpose(((transpose(((((X|X) +transpose(transpose(((X+transpose(X,7) ) +(X|X) ) ,4) ,12) ) +transpose(transpose((X+transpose(X,7) ) ,-5) ,4) ) +transpose(shuffle(transpose(X,-7) ) ,7) ) ,4) +transpose(arpeggio(step((X|(X+X) ) ,12) ) ,4) ) +transpose(step(step(X,12) ,12) ,7) ) ,7) ) ) +arpeggio((transpose(step(step(shuffle(arpeggio(X) ) ,12) ,12) ,-7) +transpose(transpose(((((X+X) |X) +transpose((echo(X,4,6) +transpose(X,12) ) ,7) ) +step(transpose(X,-7) ,12) ) ,-5) ,12) ) ) ) +(transpose(transpose(((((((transpose(X,4) +transpose(transpose(X,-5) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(arpeggio(X) ,4) ) +transpose(((X+transpose(X,12) ) +transpose(X,7) ) ,7) ) ,4) ) +transpose(((transpose(X,4) |transpose((X+transpose(X,12) ) ,-5) ) |X) ,7) ) ,4) ,-7) +transpose((transpose(transpose(((transpose(X,4) +transpose(X,-5) ) |transpose(transpose(X,-7) ,-5) ) ,-5) ,4) +transpose(transpose(X,4) ,-5) ) ,-7) ) ) ,4,6) ,7) ) |transpose((transpose((((transpose((transpose(X,4) +transpose(X,7) ) ,4) +step((shuffle(X) +(X+X) ) ,12) ) |echo((shuffle((X+((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(shuffle(transpose(step(X,12) ,-7) ) ,7) ) ,4,6) ) |(((transpose(X,4) +transpose(echo((X+X) ,4,6) ,12) ) +transpose((((X|X) +transpose(arpeggio(X) ,7) ) +((echo(X,4,6) +transpose(transpose(X,-5) ,4) ) +transpose(transpose(X,4) ,7) ) ) ,12) ) |(echo(X,4,6) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ) ,-5) +transpose(shuffle(transpose(step(step((X+X) ,12) ,12) ,4) ) ,12) ) ,4) ) +transpose(transpose(shuffle(echo((step(arpeggio((X+transpose(X,12) ) ) ,12) +transpose(echo(transpose((X+transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(step(X,12) ,12) ) ,12) ) ,4) ,4,6) ,12) ) ,4,6) ) ,4) ,7) ) ,4) ,4,6) +transpose(((((echo(arpeggio(transpose((echo(X,4,6) +transpose((X+transpose(X,12) ) ,12) ) ,-7) ) ,4,6) |step(transpose((echo(X,4,6) |shuffle(transpose((echo(X,4,6) |echo(echo(X,4,6) ,4,6) ) ,-7) ) ) ,4) ,12) ) |(echo((transpose(transpose((step(transpose(X,-7) ,12) +(transpose(X,-5) +transpose((X+transpose(X,12) ) ,12) ) ) ,-7) ,4) +transpose(echo(transpose(((X+transpose(X,4) ) |transpose(X,-5) ) ,-5) ,4,6) ,7) ) ,4,6) +(((transpose((step(transpose(((X|X) +transpose((X+X) ,7) ) ,4) ,12) |shuffle(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ) ,-7) |(transpose(echo(((((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((X+X) ,4) ) +transpose(X,7) ) ,4,6) ,-7) +transpose((arpeggio(X) +transpose((((X|X) +transpose((X|X) ,12) ) +transpose(arpeggio(X) ,-5) ) ,4) ) ,12) ) ) +transpose(arpeggio(transpose((((X+X) +transpose(X,-7) ) +transpose((((((X+transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) +transpose(X,-7) ) +transpose(transpose(X,-7) ,12) ) ,12) ) ,-5) ) ,7) ) +(transpose((shuffle(arpeggio(X) ) +transpose(transpose((((X+transpose(X,12) ) +transpose(echo(X,4,6) ,4) ) +transpose(step(transpose(X,4) ,12) ,7) ) ,4) ,12) ) ,-5) +echo(((((X|X) +transpose(transpose(X,-5) ,4) ) +transpose(shuffle(X) ,7) ) +(transpose(X,4) +transpose(shuffle(X) ,12) ) ) ,4,6) ) ) ) ) +transpose((((transpose(((arpeggio(transpose(X,4) ) +transpose(transpose(transpose(transpose(X,4) ,4) ,4) ,4) ) +transpose(transpose(((((transpose(X,-7) |echo(X,4,6) ) |step((transpose(X,4) +transpose(X,4) ) ,12) ) +transpose((transpose((X+X) ,-7) +transpose(transpose(shuffle((X+transpose(X,12) ) ) ,-5) ,7) ) ,4) ) +transpose((((transpose(transpose(X,4) ,-7) |(X+transpose(X,-5) ) ) +transpose(((X+(X+transpose(X,7) ) ) |transpose(transpose(X,-5) ,-5) ) ,4) ) +transpose(((((X+transpose(X,4) ) +transpose(X,7) ) +X) +shuffle((X|X) ) ) ,7) ) ,7) ) ,4) ,7) ) ,-5) |echo(((((arpeggio(echo(step(((transpose(((X+transpose(X,7) ) +transpose((X+transpose(X,7) ) ,12) ) ,-7) +(((X+X) +transpose(transpose(X,-7) ,7) ) +((X+transpose(echo(X,4,6) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ) ) +transpose((transpose(shuffle(X) ,-7) +transpose(((X|X) +arpeggio(X) ) ,7) ) ,12) ) ,12) ,4,6) ) +transpose(transpose((echo(transpose((transpose((X+X) ,4) |transpose(X,-7) ) ,4) ,4,6) +transpose(((arpeggio(echo(transpose(transpose(X,-7) ,4) ,4,6) ) +transpose((X+transpose(X,7) ) ,12) ) +transpose(transpose(step(X,12) ,-7) ,-7) ) ,7) ) ,-7) ,4) ) +transpose(transpose(((shuffle(shuffle(X) ) +transpose(transpose(echo(transpose(X,4) ,4,6) ,-7) ,12) ) +((transpose(X,4) +transpose((X+(X+X) ) ,12) ) +(X|X) ) ) ,4) ,7) ) +transpose(((((transpose((X+X) ,-7) +transpose(X,4) ) |((((((transpose(X,4) +transpose(transpose(X,4) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose((X+X) ,7) ) |step(echo(shuffle(X) ,4,6) ,12) ) +transpose(transpose(transpose((transpose((X+X) ,4) +transpose((arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) +(X+transpose(X,12) ) ) ,12) ) ,-7) ,-5) ,4) ) +transpose(step((step(echo(X,4,6) ,12) |transpose(transpose(X,4) ,-7) ) ,12) ,7) ) ) +transpose(shuffle((((transpose(transpose(X,-7) ,-5) +transpose((X|X) ,-5) ) |((X+(X+transpose(X,12) ) ) +((X+transpose((X+transpose(X,12) ) ,4) ) +transpose((echo(X,4,6) |X) ,7) ) ) ) +transpose(transpose((((X+transpose(X,12) ) +arpeggio(X) ) +shuffle(X) ) ,4) ,12) ) ) ,-5) ) +transpose(transpose((transpose(X,-5) +transpose(((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,-7) ,12) ) ,4) ) +transpose(transpose(transpose((((((step(transpose(X,-5) ,12) +transpose((X+transpose(X,7) ) ,4) ) +transpose(X,7) ) +shuffle(step((X+X) ,12) ) ) +transpose(transpose(arpeggio(X) ,4) ,-5) ) +transpose(echo(transpose(transpose(X,4) ,-5) ,4,6) ,7) ) ,4) ,4) ,7) ) ,4,6) ) +transpose(arpeggio(transpose(arpeggio(arpeggio(echo(transpose((step((X|X) ,12) +((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,4) ) +transpose((X|X) ,7) ) ) ,-7) ,4,6) ) ) ,-7) ) ,4) ) +transpose(step(step(transpose(((arpeggio(transpose(((transpose(X,4) +transpose(X,4) ) +transpose(step(X,12) ,7) ) ,-5) ) +transpose(echo(transpose(echo(X,4,6) ,4) ,4,6) ,7) ) +((X+transpose(echo((X|echo(X,4,6) ) ,4,6) ,4) ) +transpose(((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(echo(transpose(X,4) ,4,6) ,4) ) +transpose(step(transpose(X,4) ,12) ,7) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) +transpose((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ) ,12) ) ,7) ) ) ,-5) ,12) ,12) ,7) ) ,12) ) +shuffle(shuffle(transpose((((transpose(shuffle(((arpeggio(echo(shuffle(X) ,4,6) ) +transpose((((X+transpose((X+transpose(X,7) ) ,4) ) +transpose((echo(X,4,6) +X) ,7) ) +transpose((X|transpose((transpose(X,4) +(X+transpose(X,12) ) ) ,4) ) ,12) ) ,4) ) +transpose(transpose(((((X+transpose((X|X) ,12) ) |arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(shuffle(arpeggio(X) ) ,7) ) |step(step(X,12) ,12) ) ,4) ,7) ) ) ,-7) +transpose((((((transpose(((transpose(step(X,12) ,-5) |shuffle(shuffle(transpose(X,4) ) ) ) |(arpeggio((X+X) ) +transpose(shuffle(X) ,12) ) ) ,-7) +transpose((transpose(transpose(transpose(((X+X) +transpose(X,7) ) ,-5) ,4) ,4) +transpose(transpose(transpose(transpose(echo(X,4,6) ,-7) ,-5) ,4) ,12) ) ,4) ) +transpose(transpose((step((echo(X,4,6) +arpeggio(X) ) ,12) |(step(arpeggio(X) ,12) +(((X+transpose(X,4) ) +transpose(X,7) ) +step(X,12) ) ) ) ,4) ,7) ) +transpose((((transpose((X|((X+transpose(X,4) ) +transpose(((X+X) +transpose((X|X) ,4) ) ,12) ) ) ,-5) +transpose((step(((X+X) |arpeggio(X) ) ,12) +transpose(step(((X+transpose(X,7) ) +transpose(transpose((X+transpose(X,12) ) ,4) ,12) ) ,12) ,12) ) ,4) ) +transpose(echo(arpeggio((transpose((X+X) ,4) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ) ,4,6) ,7) ) +transpose(step(step(((step(X,12) +transpose((X+transpose(X,7) ) ,7) ) |shuffle(arpeggio((X|(X+transpose(X,12) ) ) ) ) ) ,12) ,12) ,12) ) ,12) ) +transpose(((transpose((X|X) ,-5) +transpose((step((X+transpose(X,7) ) ,12) +transpose(transpose(X,-5) ,7) ) ,7) ) |transpose(((transpose(shuffle(X) ,-5) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ) ,4) ) +transpose((transpose(transpose((transpose(arpeggio(transpose((X+X) ,4) ) ,-5) +(step((X|X) ,12) +transpose(transpose(transpose(X,4) ,-5) ,12) ) ) ,-7) ,4) +transpose(arpeggio(transpose(step(arpeggio((X+transpose(X,7) ) ) ,12) ,4) ) ,-5) ) ,7) ) ,7) ) +transpose(transpose(((transpose(transpose(transpose(step(transpose(transpose(transpose(echo(((X+transpose(X,12) ) +X) ,4,6) ,-7) ,-7) ,-5) ,12) ,4) ,-5) ,-5) +transpose((((transpose(((arpeggio(transpose(X,-5) ) +transpose(transpose(((X+transpose(X,12) ) |X) ,-7) ,4) ) +transpose((transpose(transpose(X,4) ,-7) +((X|X) |(X|X) ) ) ,7) ) ,-5) +transpose(transpose(((X|X) +X) ,4) ,4) ) +transpose(transpose((shuffle((((transpose(X,-5) |(step(X,12) +X) ) +transpose((X+transpose(X,-5) ) ,4) ) +transpose((transpose((X+transpose(X,7) ) ,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ) +(arpeggio(transpose(shuffle(X) ,-7) ) +transpose(transpose((X+X) ,-7) ,12) ) ) ,-5) ,4) ) +transpose(transpose(transpose(X,-7) ,4) ,7) ) ,4) ) +transpose(((((step(transpose(echo((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4,6) ,-7) ,12) |arpeggio(((transpose(transpose(X,-7) ,-7) |(X+transpose(X,7) ) ) +transpose(((transpose((X+X) ,-7) +transpose(arpeggio((transpose(X,-7) +transpose(X,-5) ) ) ,4) ) +transpose(arpeggio(transpose(X,-7) ) ,7) ) ,-5) ) ) ) +transpose((((echo((arpeggio(X) +transpose((X+transpose(X,7) ) ,7) ) ,4,6) +transpose(echo((X+transpose((X+X) ,4) ) ,4,6) ,4) ) +transpose((transpose(shuffle((((X+transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) |step((X+X) ,12) ) ) ,4) +transpose(X,7) ) ,7) ) +((arpeggio(shuffle((transpose(X,-5) +transpose(transpose((X|X) ,-7) ,7) ) ) ) +(transpose(step(X,12) ,-7) +transpose(transpose((echo(X,4,6) +shuffle(X) ) ,4) ,7) ) ) +transpose(shuffle(transpose(transpose(step((X+X) ,12) ,-5) ,4) ) ,7) ) ) ,4) ) +transpose(arpeggio((transpose(transpose(transpose(transpose(echo(transpose(X,-7) ,4,6) ,4) ,4) ,4) ,4) +echo(transpose(echo((X+transpose(X,12) ) ,4,6) ,-5) ,4,6) ) ) ,7) ) +(step(transpose(echo(echo(X,4,6) ,4,6) ,4) ,12) +transpose(step(transpose((((X|X) +transpose((X|transpose(X,-5) ) ,4) ) |transpose(((shuffle(echo(X,4,6) ) +transpose(X,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,-7) ) ,4) ,12) ,-5) ) ) ,7) ) ,-5) ,4) ) +transpose(transpose(echo(((transpose((arpeggio(transpose(step(shuffle(transpose(X,-7) ) ,12) ,-5) ) +transpose(X,4) ) ,-5) +transpose(transpose(((((((X+transpose(X,12) ) +transpose(shuffle(X) ,7) ) |step((shuffle(X) +transpose(transpose(X,4) ,-7) ) ,12) ) +(step((X+transpose(X,-5) ) ,12) +transpose(step(shuffle(echo(echo(X,4,6) ,4,6) ) ,12) ,7) ) ) +transpose(transpose(((transpose(shuffle(shuffle((X|X) ) ) ,-7) +transpose(transpose((transpose(X,4) |(((X+transpose(X,7) ) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ) ,4) ,4) ) +transpose(echo(step(transpose(arpeggio(X) ,-5) ,12) ,4,6) ,7) ) ,-7) ,4) ) +transpose(step(echo(transpose((((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) ,-5) ,4,6) ,12) ,7) ) ,-7) ,4) ) +transpose(transpose(((transpose(transpose(arpeggio(X) ,4) ,-5) |((transpose(transpose((X|(X|X) ) ,4) ,-5) +transpose(transpose(step(X,12) ,4) ,-5) ) |(echo(transpose(X,4) ,4,6) +transpose(transpose(((step(X,12) +transpose(X,7) ) +transpose((X+transpose(X,12) ) ,12) ) ,-7) ,12) ) ) ) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) ,-7) ,7) ) ,4,6) ,-5) ,7) ) ,-7) ) ) ) ,12) ) ,-7) random seed used was 177436589 NOTE: Generated phrase was too large ( 5191 ) , it has been truncated at 5000 notes. EXPR = echo(transpose(((shuffle((shuffle(shuffle((arpeggio(echo(step((transpose(X,4) +transpose((X+transpose(X,12) ) ,7) ) ,12) ,4,6) ) +transpose((((transpose((transpose((X|X) ,-5) |((X|X) +transpose((X|X) ,12) ) ) ,-7) +transpose(transpose(X,-5) ,4) ) +transpose(step(transpose((X+transpose(arpeggio(X) ,7) ) ,-5) ,12) ,7) ) |echo((echo(X,4,6) +transpose((X+transpose(X,7) ) ,12) ) ,4,6) ) ,12) ) ) ) |(transpose(shuffle(((transpose((X|transpose(transpose(X,-5) ,-7) ) ,-5) +transpose(transpose(arpeggio(((transpose(X,-5) +transpose(echo(X,4,6) ,4) ) +transpose(((X|X) |transpose(X,-7) ) ,7) ) ) ,-7) ,4) ) +transpose(transpose(transpose(transpose(((transpose(X,4) +transpose((transpose(X,4) +transpose((X+X) ,7) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) ,-5) ,-7) ,-7) ,7) ) ) ,-5) +transpose(transpose(((transpose(X,-5) |X) |transpose(transpose(((X+transpose(transpose(X,4) ,7) ) +transpose(transpose(X,4) ,7) ) ,-5) ,-5) ) ,-7) ,7) ) ) ) |transpose((transpose((((transpose(echo((transpose(X,-7) +(X+X) ) ,4,6) ,-7) |echo((((transpose(X,-5) |transpose(echo(X,4,6) ,-7) ) |(X+(X+transpose(X,7) ) ) ) +step(transpose(step(transpose(X,-7) ,12) ,-5) ,12) ) ,4,6) ) +transpose(transpose(((transpose(shuffle(transpose(X,-7) ) ,4) +transpose(X,-7) ) +transpose(transpose(step(X,12) ,-7) ,-7) ) ,-7) ,4) ) +transpose(((X|transpose(X,-5) ) +X) ,7) ) ,-7) |((((transpose(transpose(X,4) ,-7) +transpose(transpose((echo(X,4,6) +transpose(transpose(X,-7) ,7) ) ,-5) ,12) ) |(echo((X|X) ,4,6) +transpose(((echo(step(X,12) ,4,6) |transpose(X,-5) ) |(transpose(X,-5) +X) ) ,12) ) ) |((transpose(transpose(X,-7) ,4) +step((shuffle(X) |((X+X) +X) ) ,12) ) +transpose(shuffle(transpose(((transpose((X+transpose(X,7) ) ,-5) +transpose(step(transpose(X,4) ,12) ,4) ) +transpose(arpeggio(transpose(X,4) ) ,7) ) ,4) ) ,12) ) ) +transpose((transpose((((transpose(X,-7) +transpose(X,4) ) +transpose(X,7) ) |transpose((X|X) ,-5) ) ,-5) +(((((X+transpose(arpeggio(X) ,12) ) +transpose(transpose(X,-7) ,4) ) +transpose(echo(step(X,12) ,4,6) ,7) ) +transpose(transpose(transpose((X+X) ,-7) ,4) ,7) ) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) ) ,7) ) ) ,4) ) +((shuffle(transpose(transpose(((shuffle(arpeggio(((step(X,12) +transpose((X+transpose(X,12) ) ,4) ) +transpose((echo(X,4,6) |transpose(X,4) ) ,7) ) ) ) |transpose(shuffle(transpose(transpose((X+X) ,-7) ,-5) ) ,-5) ) |(((((((shuffle((X+transpose(X,12) ) ) |step(X,12) ) +transpose(echo((X+X) ,4,6) ,4) ) +transpose((echo(X,4,6) +transpose((X|X) ,-7) ) ,7) ) +transpose(arpeggio(shuffle(transpose(X,-5) ) ) ,4) ) +transpose((((X+transpose((X|X) ,4) ) +transpose(X,7) ) |((X+transpose(step(X,12) ,4) ) +transpose((X+X) ,7) ) ) ,7) ) +transpose(transpose(((((X+transpose(X,12) ) |transpose(X,-7) ) +transpose(((transpose(X,4) +transpose((X+X) ,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) +((transpose(X,-7) +transpose(transpose(X,-5) ,4) ) +transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,7) ) ) ,-5) ,4) ) +transpose(((((X+X) |(transpose(X,-5) |X) ) +transpose(((transpose(X,4) |X) +transpose((step(X,12) |X) ,7) ) ,7) ) +((X|transpose(X,4) ) +transpose(step(X,12) ,12) ) ) ,7) ) ) ,-5) ,-7) ) +(arpeggio((transpose((((((shuffle(X) +transpose((X+transpose(X,12) ) ,4) ) +transpose(X,7) ) +transpose(step(transpose(X,4) ,12) ,4) ) +transpose((X+echo(X,4,6) ) ,7) ) +transpose(transpose(((X+X) |(X|X) ) ,-5) ,12) ) ,-7) |arpeggio((((step((((transpose(X,-5) +transpose(shuffle(X) ,4) ) +transpose(X,7) ) |step(X,12) ) ,12) +transpose(((shuffle(transpose(transpose(step(X,12) ,-7) ,4) ) +transpose(((shuffle((X+X) ) +transpose((arpeggio(X) +(transpose(X,-5) |(step(X,12) |X) ) ) ,4) ) +transpose(transpose(echo(X,4,6) ,-5) ,7) ) ,4) ) +transpose(step((step(X,12) |X) ,12) ,7) ) ,12) ) +transpose(transpose((echo(X,4,6) |transpose(transpose((X+transpose(X,12) ) ,4) ,4) ) ,-5) ,4) ) +transpose((transpose(arpeggio((X|X) ) ,-7) +((echo(X,4,6) +transpose(arpeggio(X) ,12) ) +transpose((transpose((X+transpose(X,12) ) ,-7) +transpose(transpose(echo(X,4,6) ,4) ,7) ) ,7) ) ) ,7) ) ) ) ) |transpose(((transpose(((transpose(X,4) +transpose(transpose(transpose(transpose(X,-7) ,-7) ,4) ,4) ) +transpose(transpose(step((X+transpose(X,7) ) ,12) ,-5) ,7) ) ,-7) +transpose(((transpose(shuffle(shuffle(transpose(X,-7) ) ) ,-5) +transpose(step(transpose((transpose(X,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ,4) ,12) ,12) ) +transpose(transpose(transpose(((transpose((((X+transpose(X,4) ) +transpose(X,7) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-7) +X) +transpose(((X|X) +transpose(X,12) ) ,7) ) ,-5) ,-7) ,7) ) ,4) ) +transpose((transpose((((transpose(X,4) +X) +transpose((((X|step(X,12) ) +transpose(arpeggio(X) ,4) ) +transpose(arpeggio(arpeggio(X) ) ,7) ) ,4) ) +transpose(((X+transpose(echo(X,4,6) ,12) ) |transpose(X,-7) ) ,7) ) ,-5) +transpose(transpose(((((step(X,12) +transpose(X,12) ) +transpose(((transpose(X,-7) +transpose((X|X) ,7) ) +transpose(X,12) ) ,12) ) |shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ) +transpose(arpeggio((((X+transpose((X+X) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(((X|X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,4) ) ) ,7) ) ,4) ,12) ) ,7) ) ,4) ) ) |shuffle(transpose(transpose((transpose(step((arpeggio(arpeggio(X) ) +transpose(transpose(transpose(X,-5) ,-7) ,7) ) ,12) ,-5) +(((((echo((X|X) ,4,6) +transpose((transpose(transpose(X,-7) ,4) +transpose(shuffle((X+X) ) ,12) ) ,7) ) +transpose((transpose(transpose(X,-7) ,4) +echo((X+X) ,4,6) ) ,4) ) +transpose(transpose(transpose(((X+transpose(X,12) ) +transpose((X+X) ,7) ) ,-7) ,-7) ,7) ) +transpose(transpose(transpose((transpose(X,-5) |shuffle(X) ) ,4) ,4) ,7) ) +transpose(((X+transpose(X,12) ) +transpose(arpeggio(step((X+transpose(X,12) ) ,12) ) ,12) ) ,-5) ) ) ,-7) ,-7) ) ) ) ,-5) ,4,6) random seed used was 0 EXPR = shuffle(shuffle((shuffle(transpose((((step((((((X+transpose(transpose(X,-7) ,12) ) +(arpeggio(X) +(X+transpose(X,12) ) ) ) |transpose(X,-5) ) +transpose((transpose((step(X,12) +transpose(X,7) ) ,4) |shuffle(step(X,12) ) ) ,4) ) +transpose(((transpose(X,-5) |transpose(X,-5) ) +transpose((((X+transpose(X,12) ) +step(X,12) ) |X) ,7) ) ,7) ) ,12) |step(transpose(((X+transpose(X,7) ) +shuffle(arpeggio((X+transpose(X,7) ) ) ) ) ,-5) ,12) ) +transpose(shuffle(((((X+transpose(X,12) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) +transpose((step((X+transpose(X,7) ) ,12) |((transpose(X,-5) +transpose((X+transpose(X,12) ) ,4) ) +transpose(((X+X) +shuffle((X+transpose(X,12) ) ) ) ,7) ) ) ,4) ) +transpose(((X+transpose(X,7) ) |((X+transpose(X,12) ) |transpose(X,4) ) ) ,7) ) ) ,12) ) |step(((transpose(transpose(X,-7) ,4) |((X+transpose(transpose(X,4) ,4) ) +transpose((X+X) ,7) ) ) +transpose((X+X) ,7) ) ,12) ) ,-5) ) |(step(((transpose(((transpose(((transpose((transpose(X,4) |(X+transpose(X,4) ) ) ,-7) +(transpose((X+transpose(X,12) ) ,-7) +transpose((X|X) ,4) ) ) +transpose(transpose(step(((X+transpose((X|X) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,12) ,4) ,7) ) ,-7) +transpose(arpeggio(arpeggio(echo(transpose(arpeggio((((X+transpose(X,4) ) +transpose(X,7) ) |transpose(X,-7) ) ) ,-7) ,4,6) ) ) ,7) ) +transpose(transpose(transpose((transpose((transpose(step(transpose(X,-5) ,12) ,-5) |transpose((((X+transpose(X,12) ) +transpose((X+X) ,4) ) +transpose(X,7) ) ,4) ) ,-5) +transpose((((transpose(X,-7) +transpose((shuffle(X) +step(X,12) ) ,12) ) |transpose((X|X) ,-5) ) |step((X+transpose(X,7) ) ,12) ) ,4) ) ,-5) ,-7) ,7) ) ,-5) +transpose(transpose(shuffle((transpose(((transpose(shuffle(shuffle(X) ) ,-5) +transpose(arpeggio(transpose((X+transpose(X,12) ) ,-5) ) ,4) ) +transpose((transpose(transpose(X,-7) ,4) +transpose(transpose(shuffle(X) ,-7) ,7) ) ,7) ) ,4) +transpose(((((((shuffle(X) |(transpose(X,-5) +transpose(X,-5) ) ) +transpose((shuffle(echo(X,4,6) ) +shuffle((transpose((X+transpose(X,12) ) ,-5) +(X+transpose(X,7) ) ) ) ) ,4) ) +transpose(transpose((transpose(shuffle((X+transpose(X,12) ) ) ,4) |((transpose(X,4) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ,4) ,7) ) +(transpose(transpose(transpose(X,-7) ,-5) ,4) |(X+transpose(X,12) ) ) ) +transpose(transpose((arpeggio(X) +transpose(transpose(transpose(transpose(X,-7) ,-5) ,4) ,7) ) ,-5) ,4) ) +transpose(step((((arpeggio(echo(X,4,6) ) +transpose(X,-5) ) +transpose(shuffle(transpose(X,-7) ) ,7) ) +transpose(shuffle(transpose((X|X) ,-7) ) ,7) ) ,12) ,7) ) ,12) ) ) ,-7) ,4) ) +transpose(transpose((((transpose(shuffle(transpose((arpeggio(X) |(X+transpose((X+transpose(X,7) ) ,12) ) ) ,4) ) ,4) +transpose(echo((((echo((X|(X|X) ) ,4,6) |(X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) +((echo(X,4,6) +transpose((transpose(X,-5) +transpose(X,4) ) ,7) ) +echo(X,4,6) ) ) +transpose(transpose(transpose(transpose(X,-5) ,-5) ,-5) ,7) ) ,4,6) ,7) ) +transpose(transpose((X+transpose(transpose((X+transpose(X,12) ) ,-7) ,12) ) ,4) ,4) ) +transpose(transpose(echo(echo(transpose(transpose(X,-7) ,-5) ,4,6) ,4,6) ,-7) ,7) ) ,-5) ,7) ) ,12) +transpose((((transpose((step(X,12) +transpose(echo(step(transpose(((transpose(X,-7) +transpose(X,-5) ) +echo(X,4,6) ) ,-7) ,12) ,4,6) ,7) ) ,4) +transpose((((((X+transpose(X,7) ) +transpose((transpose(X,4) +transpose(step(X,12) ,12) ) ,7) ) +transpose(step(((arpeggio(X) +transpose((X|X) ,12) ) |((X|shuffle(X) ) +transpose((transpose(X,-5) |transpose(X,-7) ) ,7) ) ) ,12) ,4) ) +transpose(arpeggio((echo(X,4,6) |X) ) ,7) ) +transpose(((((((X+transpose(shuffle((X+transpose(X,12) ) ) ,4) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) ,7) ) |((X|transpose(X,-7) ) |transpose(X,-5) ) ) +transpose(step(arpeggio(X) ,12) ,4) ) +transpose(transpose((X+transpose(step(step(X,12) ,12) ,7) ) ,-5) ,7) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,4) ) +transpose((echo(((transpose(((transpose(X,-7) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ,-5) |echo((transpose(X,4) +((X+transpose(X,7) ) +(X+transpose(X,12) ) ) ) ,4,6) ) +transpose(transpose(echo(transpose(X,-7) ,4,6) ,-5) ,7) ) ,4,6) +(transpose(transpose(((X+transpose((X|X) ,7) ) |(X+transpose((X|X) ,7) ) ) ,4) ,-5) +(transpose(echo(X,4,6) ,-7) |((X|X) +transpose((X+X) ,12) ) ) ) ) ,7) ) |((transpose(arpeggio((((echo((transpose(step(X,12) ,4) +transpose(X,7) ) ,4,6) +transpose((transpose((((X+transpose(X,7) ) +transpose(transpose(X,4) ,12) ) +transpose((X+X) ,12) ) ,-5) |((X+(X|X) ) |transpose(X,-7) ) ) ,4) ) +transpose(transpose(X,4) ,7) ) +transpose(transpose(transpose(transpose(X,4) ,-7) ,4) ,4) ) ) ,4) +transpose((arpeggio((shuffle(step((((transpose(X,-5) +echo(X,4,6) ) +transpose((X+transpose(X,7) ) ,12) ) |transpose((arpeggio(X) +transpose(transpose(X,-5) ,12) ) ,-7) ) ,12) ) +transpose(step(((X+transpose(X,7) ) +echo(X,4,6) ) ,12) ,12) ) ) +transpose(((((transpose((transpose((((X+transpose(step(X,12) ,4) ) +transpose(((transpose(X,-7) +transpose(X,4) ) +transpose(X,7) ) ,7) ) |step(X,12) ) ,-7) +transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,4) +transpose(arpeggio(transpose((transpose(X,4) +arpeggio(X) ) ,-5) ) ,12) ) +transpose(shuffle(transpose(transpose(transpose(X,-5) ,-7) ,-7) ) ,4) ) +transpose(transpose((transpose(echo((X+transpose(X,7) ) ,4,6) ,-5) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ,7) ) |(transpose((transpose(X,-7) |echo((step(shuffle(X) ,12) |((X+X) |transpose(X,-5) ) ) ,4,6) ) ,4) |((shuffle((step(X,12) +transpose(arpeggio(echo(X,4,6) ) ,7) ) ) +transpose((step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) +transpose(transpose(X,4) ,12) ) ,7) ) +transpose(step((transpose(step(arpeggio(X) ,12) ,-5) +transpose(transpose((transpose(X,-5) |X) ,-5) ,7) ) ,12) ,-7) ) ) ) ,12) ) ,4) ) +transpose(transpose(((transpose((transpose(X,-7) +transpose(shuffle(X) ,12) ) ,-7) |echo(((shuffle((X|X) ) +transpose(shuffle(transpose((X|X) ,4) ) ,4) ) +transpose(((X+transpose(X,12) ) +X) ,7) ) ,4,6) ) |(step((transpose(transpose(((transpose(X,-7) +transpose((X+X) ,4) ) +transpose(X,7) ) ,-5) ,4) +transpose(((transpose(X,-7) +transpose(echo(X,4,6) ,4) ) +transpose((X|X) ,7) ) ,-7) ) ,12) +(transpose(transpose(transpose(X,4) ,-7) ,-7) |(((X+transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) |transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) ) ) ) ,-5) ,7) ) ) ,12) ) ) ) ) random seed used was 0 EXPR = (step(transpose(transpose(((((((transpose((X+transpose(X,12) ) ,-7) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,12) ) +echo(transpose(((X+X) |(X+transpose(shuffle(X) ,7) ) ) ,-5) ,4,6) ) +transpose((((shuffle((X|X) ) |step(transpose(X,-5) ,12) ) +transpose(transpose((((X+transpose(X,7) ) +transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) ,-7) ,4) ) +transpose(transpose((X+X) ,4) ,7) ) ,7) ) +(((echo((shuffle(X) +(X+echo(X,4,6) ) ) ,4,6) +((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +echo(X,4,6) ) |shuffle((((X+X) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) ) ) ) +transpose((transpose(X,-5) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ) +(((transpose(arpeggio(transpose(transpose(X,-5) ,-7) ) ,4) +transpose(transpose(((X+transpose((X+transpose(X,12) ) ,12) ) +(transpose((X+X) ,-5) |(transpose(X,-5) +transpose(X,12) ) ) ) ,4) ,4) ) +transpose(transpose((transpose((X+X) ,4) +transpose((((X+transpose(X,12) ) +transpose((X+transpose(X,12) ) ,7) ) +X) ,7) ) ,-5) ,7) ) +transpose(transpose((transpose(X,-7) +transpose(X,7) ) ,-7) ,7) ) ) ) +transpose((transpose((transpose((echo((X+X) ,4,6) |((X+transpose((X+transpose(X,7) ) ,7) ) |transpose(X,-7) ) ) ,-7) |step(transpose((step(X,12) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,-5) ,12) ) ,-5) +transpose((((transpose(((step(X,12) +transpose(X,4) ) +transpose(X,7) ) ,4) +transpose((X+transpose(X,12) ) ,4) ) +transpose(transpose((X+transpose(X,7) ) ,4) ,7) ) +echo(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4,6) ) ,12) ) ,12) ) +transpose((transpose(((transpose((step(transpose(shuffle(transpose(X,-7) ) ,-5) ,12) |(transpose((X+transpose(step(X,12) ,12) ) ,-7) +transpose(((transpose(X,-5) |(X|X) ) +(transpose(X,4) +transpose((X+X) ,7) ) ) ,12) ) ) ,-7) +transpose(transpose(transpose((((((transpose(X,4) +transpose((X+X) ,7) ) +transpose(X,4) ) +transpose(((X|X) +transpose(X,12) ) ,7) ) +transpose(step((X+transpose((X+transpose(X,12) ) ,7) ) ,12) ,4) ) +transpose(shuffle((X+transpose(X,-5) ) ) ,7) ) ,4) ,4) ,12) ) |step((step(transpose(arpeggio(X) ,-5) ,12) |transpose(echo(((X+transpose((X+transpose(X,7) ) ,12) ) +((X|X) |echo(X,4,6) ) ) ,4,6) ,4) ) ,12) ) ,-5) +transpose(transpose(step(transpose(arpeggio((transpose(X,-5) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,7) ) ) ,4) ,12) ,-5) ,7) ) ,12) ) ,4) ,-7) ,12) +((shuffle(shuffle(transpose(arpeggio(((shuffle(transpose(transpose(transpose((X|arpeggio(X) ) ,4) ,4) ,-7) ) +transpose(transpose(transpose(transpose((X+transpose(X,7) ) ,4) ,-7) ,-7) ,-7) ) |(((transpose(X,-5) +transpose(arpeggio((X+(X+transpose(X,7) ) ) ) ,12) ) +transpose(transpose(transpose((X+transpose(X,12) ) ,4) ,4) ,7) ) +step(transpose(echo(step(transpose(X,-5) ,12) ,4,6) ,-5) ,12) ) ) ) ,-5) ) ) |transpose((((transpose((shuffle(((step(transpose(X,-5) ,12) +transpose(transpose((X|X) ,4) ,7) ) +transpose(X,-5) ) ) |((shuffle(step((transpose(X,-5) |X) ,12) ) +transpose(transpose(transpose((arpeggio(transpose(X,-7) ) +transpose((X+transpose(X,12) ) ,12) ) ,-7) ,4) ,4) ) +transpose(echo((((transpose((X+X) ,-7) +(X+transpose(X,-7) ) ) +transpose(((echo(X,4,6) +X) +step(step(X,12) ,12) ) ,4) ) +transpose(transpose((X|X) ,-5) ,7) ) ,4,6) ,7) ) ) ,4) +transpose(transpose((transpose((transpose(((X+transpose(echo(X,4,6) ,7) ) |transpose((X|X) ,-5) ) ,4) +(X+transpose(((transpose(X,4) +transpose((X+transpose(X,12) ) ,4) ) +transpose((X+(X|X) ) ,7) ) ,7) ) ) ,-5) +transpose((echo(step(transpose(X,-7) ,12) ,4,6) |step((transpose(X,-5) +transpose((X+transpose(transpose(X,-7) ,12) ) ,7) ) ,12) ) ,-7) ) ,-7) ,12) ) +((arpeggio((((((((X+transpose(X,7) ) +transpose(transpose((X+transpose(X,7) ) ,-5) ,7) ) +transpose(transpose((X|X) ,-7) ,7) ) +transpose((X+((transpose(X,4) |((X+transpose(X,4) ) +transpose(X,7) ) ) +step(X,12) ) ) ,4) ) +transpose(transpose((transpose((transpose(X,4) |(step(X,12) +transpose(X,7) ) ) ,-7) +(echo(shuffle(X) ,4,6) +transpose(transpose((X|X) ,-5) ,12) ) ) ,4) ,7) ) +transpose((transpose((transpose(arpeggio(X) ,-7) +transpose(transpose((transpose(X,-7) +step(X,12) ) ,4) ,12) ) ,-5) +echo(transpose(transpose(X,-7) ,-7) ,4,6) ) ,7) ) +transpose((transpose(transpose(transpose(X,4) ,-5) ,-5) +transpose(shuffle((((X|X) +X) +X) ) ,12) ) ,7) ) ) +transpose((transpose((echo(((X+transpose(X,4) ) +transpose(X,7) ) ,4,6) +transpose(((X+transpose(X,7) ) +transpose(arpeggio(X) ,7) ) ,12) ) ,-5) +shuffle((X+X) ) ) ,4) ) +transpose(transpose((transpose(step(transpose((X+X) ,-5) ,12) ,-5) +echo((X+transpose(transpose(X,-7) ,12) ) ,4,6) ) ,-5) ,7) ) ) +transpose(shuffle((transpose((transpose(((shuffle(X) +(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-7) ,7) ) ) +X) ,-5) +transpose(shuffle(((X|transpose(X,-5) ) +((X+transpose(step(X,12) ,12) ) +transpose(X,12) ) ) ) ,7) ) ,-7) +transpose(arpeggio(transpose((((X+transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) ) +transpose(arpeggio((X|X) ) ,7) ) |transpose(transpose(transpose((((X+X) +transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ,4) ,-7) ,4) ) ,-7) ) ,12) ) ) ,12) ) ,-7) ) |transpose((transpose(transpose(((transpose(transpose(transpose(transpose((X+transpose(X,12) ) ,4) ,-5) ,-7) ,-7) +((transpose((X+transpose(X,12) ) ,-5) |shuffle((((X|((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(X,4) ) +transpose(transpose(shuffle(X) ,-7) ,7) ) ) ) +transpose(echo(transpose((transpose(X,4) +transpose(arpeggio(X) ,12) ) ,-7) ,4,6) ,12) ) ) +((transpose((((X+transpose(X,4) ) +transpose((X+X) ,7) ) +transpose(X,7) ) ,4) |(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-7) |(echo(step(X,12) ,4,6) +transpose(((X+transpose(X,7) ) |(X+X) ) ,7) ) ) ) |echo(transpose((((echo(X,4,6) +shuffle(X) ) |X) +transpose(transpose((X|X) ,-7) ,4) ) ,-5) ,4,6) ) ) ,4) ,-5) |step((transpose(transpose(echo(((transpose((X+transpose(X,7) ) ,-7) +transpose(transpose((X|arpeggio(X) ) ,4) ,4) ) +transpose(transpose(((((X|X) +transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) |shuffle(X) ) ,-5) ,7) ) ,4,6) ,-5) ,-5) +transpose(shuffle(transpose((transpose(step(((transpose(transpose(X,-7) ,-5) |transpose(transpose(X,-7) ,-5) ) +transpose(transpose(X,-5) ,4) ) ,12) ,4) +transpose((((X|arpeggio(X) ) +transpose(step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ,12) ) +transpose(transpose((((X+transpose(X,7) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(arpeggio(arpeggio(X) ) ,7) ) ,-5) ,4) ) ,7) ) ,-5) ) ,7) ) ,12) ) ,4) ) ) random seed used was 0

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