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: (shuffle((transpose((transpose(step(transpose(step(echo(shuffle(transpose(X,-5) ) ,4,6) ,12) ,-7) ,12) ,4) +echo((step(arpeggio((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-7) |(arpeggio(step(transpose(X,-7) ,12) ) +transpose((X|echo(X,4,6) ) ,4) ) ) ) ,12) +transpose((((transpose(step(shuffle((X+transpose((X+X) ,7) ) ) ,12) ,4) +transpose(step(transpose(transpose(X,4) ,-7) ,12) ,7) ) +transpose((((transpose((X+X) ,-7) +transpose(transpose((X+transpose(X,12) ) ,-7) ,12) ) |(shuffle(transpose(X,-5) ) +transpose(((X|X) +X) ,4) ) ) +transpose(transpose(transpose(((X+transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,4) ,7) ) ,-5) ,4) ,7) ) ,7) ) |(transpose(arpeggio(((X+X) +transpose(transpose(X,-5) ,12) ) ) ,-7) |transpose((echo((echo(X,4,6) +transpose(X,12) ) ,4,6) +echo(step(X,12) ,4,6) ) ,-5) ) ) ,7) ) ,4,6) ) ,4) |((arpeggio(((transpose((transpose(transpose(transpose(transpose((transpose(transpose(transpose(transpose(X,4) ,4) ,-5) ,-7) +transpose(transpose(transpose(X,-7) ,-7) ,12) ) ,4) ,-7) ,4) ,-5) +(((transpose(echo(transpose(X,-7) ,4,6) ,-5) +transpose(echo(transpose(X,-7) ,4,6) ,7) ) +((arpeggio(transpose(X,-5) ) |echo(transpose(X,4) ,4,6) ) +((transpose(X,-7) +transpose((((X|X) +(X+transpose(X,12) ) ) +transpose(X,-7) ) ,4) ) +transpose(transpose(X,-7) ,7) ) ) ) +transpose(((transpose(step(transpose(arpeggio(transpose(X,-7) ) ,4) ,12) ,-5) +transpose(transpose(transpose(((echo(X,4,6) +transpose(((X+X) +transpose(X,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,-7) ,-5) ,4) ) +transpose(((((((X|X) |transpose(X,-7) ) +transpose((X+transpose(X,12) ) ,-7) ) +transpose(echo(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,4,6) ,4) ) +transpose(step((X+X) ,12) ,7) ) |transpose((transpose((X+transpose(X,12) ) ,-5) +(X|(X+X) ) ) ,4) ) ,7) ) ,7) ) ) ,-7) +transpose(((transpose(shuffle(transpose(shuffle(transpose(((X+transpose(X,4) ) +transpose((X+transpose(X,12) ) ,7) ) ,-5) ) ,-7) ) ,4) +arpeggio(echo((echo((transpose(((echo(X,4,6) +transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ) |transpose(transpose(X,-5) ,-7) ) ,-7) |step(((X+transpose(step(X,12) ,7) ) +transpose(shuffle(transpose(X,4) ) ,7) ) ,12) ) ,4,6) +transpose((step(arpeggio((X|X) ) ,12) +transpose(echo(transpose((X+transpose(X,12) ) ,4) ,4,6) ,12) ) ,-5) ) ,4,6) ) ) +transpose((transpose(((shuffle(arpeggio(((transpose(X,-7) +transpose(shuffle(X) ,4) ) +transpose((X|X) ,7) ) ) ) +transpose(transpose((echo(((shuffle(X) +transpose(X,12) ) +transpose(X,-7) ) ,4,6) +echo(X,4,6) ) ,4) ,4) ) +transpose(arpeggio(transpose(X,-5) ) ,7) ) ,-5) +transpose((((transpose(((X+transpose(X,12) ) +shuffle(X) ) ,-7) +transpose((X+transpose(X,-5) ) ,7) ) +((transpose(((arpeggio(X) +X) +transpose(step(X,12) ,7) ) ,4) +transpose(step((echo((transpose(X,-7) +transpose(((X+transpose((X|X) ,4) ) +transpose((X+X) ,7) ) ,12) ) ,4,6) +transpose(echo((X+transpose((X+X) ,12) ) ,4,6) ,12) ) ,12) ,4) ) +transpose((((transpose(X,-5) +transpose(transpose(X,-5) ,12) ) |transpose(X,4) ) +transpose(transpose(X,4) ,7) ) ,7) ) ) |transpose((transpose((((transpose(X,-7) +transpose((X+X) ,7) ) +transpose(transpose(X,-5) ,7) ) +transpose(step(arpeggio(transpose(X,-7) ) ,12) ,12) ) ,4) |transpose((transpose(shuffle(X) ,4) +transpose(transpose(((X+transpose(X,12) ) |X) ,4) ,7) ) ,-7) ) ,-7) ) ,12) ) ,12) ) ,4) ) +transpose((transpose(transpose(transpose((((transpose(((X+X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,-7) +transpose(((transpose(((transpose(X,4) +transpose(X,4) ) +transpose((X+X) ,7) ) ,-7) +transpose(arpeggio(((X+transpose(X,12) ) |step(X,12) ) ) ,4) ) +transpose((transpose(echo(X,4,6) ,-5) +(X+transpose(X,7) ) ) ,7) ) ,4) ) +transpose((((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((X|X) ,12) ) +(echo(transpose((X|X) ,4) ,4,6) |(shuffle((X+X) ) +transpose((transpose(X,4) +(X|X) ) ,12) ) ) ) ,7) ) +((((echo((shuffle(X) |transpose(X,-5) ) ,4,6) |(((transpose(X,4) |X) +transpose((X|(X+transpose(X,7) ) ) ,4) ) +transpose((X+(X|X) ) ,7) ) ) +(transpose(step(transpose(X,-5) ,12) ,4) +transpose(transpose((X+transpose(X,12) ) ,-7) ,7) ) ) +transpose(transpose((X|transpose(shuffle(X) ,4) ) ,-5) ,7) ) +((arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(arpeggio(shuffle(X) ) ,4) ) +transpose(transpose((step(X,12) |X) ,-5) ,7) ) ) ) ,-7) ,-7) ,-5) +transpose(((((((((X+X) +transpose(transpose((X+transpose(transpose(X,4) ,12) ) ,-7) ,4) ) +transpose(echo((X|transpose(X,-7) ) ,4,6) ,7) ) |step((X+transpose(X,12) ) ,12) ) |(((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,-5) ,4) ) ) +(((transpose(X,-7) |((X+X) |transpose(X,-5) ) ) +transpose(transpose(X,-7) ,12) ) +transpose((echo(transpose(transpose(transpose(transpose(X,4) ,-5) ,-7) ,-5) ,4,6) +transpose(transpose((X+transpose(echo(X,4,6) ,7) ) ,-5) ,-5) ) ,7) ) ) +(echo((((transpose((X|(X+transpose(X,12) ) ) ,-5) |arpeggio(transpose(transpose(X,4) ,-7) ) ) +transpose((arpeggio(X) |X) ,4) ) +transpose(step((transpose(X,-5) |transpose((X+transpose(transpose(X,-7) ,7) ) ,4) ) ,12) ,7) ) ,4,6) +transpose(transpose(((((transpose((X+transpose(X,7) ) ,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(((X+X) +transpose(X,12) ) ,7) ) +transpose(transpose(transpose(X,-7) ,4) ,12) ) +transpose(((transpose(X,4) +((X|X) +(X+X) ) ) +transpose(transpose(X,-7) ,7) ) ,12) ) ,4) ,12) ) ) |((((arpeggio(X) +X) +(((X+transpose(X,4) ) +transpose(X,7) ) +X) ) |transpose(shuffle(transpose((X+transpose(X,12) ) ,-5) ) ,-5) ) |arpeggio(transpose(((transpose(((X|X) +transpose(X,12) ) ,-7) +transpose(transpose(X,-5) ,4) ) +transpose(step(((transpose(X,-7) +X) |transpose(X,-7) ) ,12) ,7) ) ,4) ) ) ) ,12) ) ,7) ) ) +(shuffle(((((transpose((transpose((transpose(X,4) |echo(X,4,6) ) ,-5) +transpose(((X+X) +transpose((transpose(X,4) |echo(((X+transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) ,4,6) ) ,7) ) ,12) ) ,-5) +transpose(transpose(transpose(((X+X) +transpose(transpose(X,4) ,12) ) ,-7) ,-7) ,7) ) +transpose(arpeggio(shuffle(transpose(X,-5) ) ) ,4) ) +transpose((arpeggio((((X+X) +transpose(transpose((X+transpose(X,7) ) ,4) ,12) ) |transpose((X|X) ,-5) ) ) +transpose(shuffle((shuffle(((((X+transpose(X,4) ) +transpose(X,7) ) +(transpose(X,-5) |transpose(X,-5) ) ) +transpose(X,7) ) ) +transpose((transpose(X,4) +transpose((X+X) ,7) ) ,7) ) ) ,12) ) ,7) ) +transpose(step(transpose(shuffle(transpose(shuffle(transpose((((X|X) +transpose(transpose(X,4) ,4) ) +transpose(arpeggio((X+X) ) ,7) ) ,4) ) ,4) ) ,-5) ,12) ,-5) ) ) +transpose(((((((transpose(step(X,12) ,-7) +(transpose((X+transpose(X,7) ) ,-5) |transpose(echo(X,4,6) ,4) ) ) |arpeggio(echo((transpose(step(X,12) ,-7) +transpose(transpose(X,-7) ,7) ) ,4,6) ) ) +transpose(transpose(arpeggio((X+X) ) ,-7) ,-7) ) +transpose(arpeggio(transpose(shuffle(transpose((transpose(X,-5) |X) ,-5) ) ,4) ) ,12) ) +transpose((echo((transpose((transpose((transpose(step(X,12) ,4) |step(X,12) ) ,-5) +(((X+transpose(X,7) ) +X) |transpose((X+transpose(X,-7) ) ,-5) ) ) ,4) +((((transpose(echo(X,4,6) ,-7) +transpose(step(transpose(transpose(X,4) ,4) ,12) ,7) ) +(transpose((X+transpose(X,7) ) ,-7) |(X|X) ) ) +transpose((transpose(transpose(transpose(transpose(X,-5) ,4) ,-7) ,-7) |((((((X+transpose(X,12) ) +transpose(echo(transpose(X,4) ,4,6) ,12) ) +transpose(((arpeggio(X) +transpose(transpose(X,4) ,12) ) |(X+transpose(X,7) ) ) ,4) ) +transpose(echo(transpose(X,4) ,4,6) ,7) ) +transpose(arpeggio((transpose(transpose(X,-5) ,-7) +X) ) ,4) ) +transpose(transpose(((transpose(X,-7) +transpose(arpeggio(X) ,4) ) +transpose(X,7) ) ,-5) ,7) ) ) ,4) ) +transpose(shuffle(X) ,7) ) ) ,4,6) +echo((transpose(step((transpose(X,-5) +((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) ,-5) +(transpose(arpeggio(transpose(arpeggio(X) ,-7) ) ,4) |transpose(((((X+transpose(X,7) ) +transpose(arpeggio(X) ,4) ) +transpose(transpose(X,-5) ,7) ) +transpose(shuffle(transpose(X,4) ) ,12) ) ,-7) ) ) ,4,6) ) ,7) ) +transpose(transpose(shuffle(shuffle(((arpeggio(((transpose(X,4) +transpose(X,12) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) ) |(X|X) ) +transpose(transpose(echo(transpose(((echo(X,4,6) +transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,4) ,4,6) ,-7) ,12) ) ) ) ,4) ,4) ) ,7) ) ) +echo(((transpose(echo(transpose(transpose((((step(echo(X,4,6) ,12) +transpose(X,7) ) +transpose(transpose(X,-5) ,-5) ) |echo(echo((((X+transpose(X,4) ) +transpose((X+X) ,7) ) |X) ,4,6) ,4,6) ) ,4) ,-5) ,4,6) ,4) +(transpose((arpeggio((((X+transpose(X,4) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) +transpose((((X+transpose(X,4) ) +transpose(X,7) ) |((X+transpose(X,12) ) +transpose(X,-7) ) ) ,12) ) ) +transpose(transpose(((((((transpose(X,4) +transpose(arpeggio((X+transpose(X,7) ) ) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) +transpose(((X+transpose(X,12) ) |transpose(X,-7) ) ,12) ) +transpose(X,4) ) +transpose(transpose(X,-5) ,4) ) +transpose(transpose((transpose(X,-7) |X) ,-5) ,7) ) ,-5) ,12) ) ,4) |(shuffle(echo(transpose(((echo(X,4,6) +X) +transpose(X,-7) ) ,-7) ,4,6) ) +shuffle((transpose(step((transpose(X,-5) +transpose((X+transpose(X,7) ) ,12) ) ,12) ,4) |transpose(echo((X|arpeggio(X) ) ,4,6) ,-7) ) ) ) ) ) +transpose((((transpose(transpose(transpose((transpose((X+transpose((X+X) ,12) ) ,-7) +transpose((transpose(transpose(X,4) ,-5) |(X+transpose(X,7) ) ) ,12) ) ,-5) ,4) ,4) +transpose(transpose((transpose(((X+transpose((X+X) ,12) ) |arpeggio((shuffle(X) +transpose(X,7) ) ) ) ,-5) |((arpeggio(arpeggio(transpose(transpose(X,4) ,4) ) ) +transpose(transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-5) ,-5) ,7) ) |((((transpose(shuffle(X) ,-7) +transpose((transpose((X+X) ,-5) +transpose(echo(X,4,6) ,12) ) ,7) ) +transpose(transpose(transpose(transpose(arpeggio((X+transpose(X,7) ) ) ,4) ,-5) ,4) ,7) ) +transpose(transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) ,4) ) +transpose(shuffle(transpose(transpose((X+step(X,12) ) ,-5) ,-7) ) ,7) ) ) ) ,-5) ,4) ) +transpose((shuffle((step(X,12) +(transpose(transpose(X,-5) ,-5) +transpose(transpose(transpose(X,-5) ,-5) ,7) ) ) ) |((transpose((X|X) ,4) +transpose((X+transpose(X,7) ) ,12) ) |echo((((X|X) +transpose((X+transpose(X,7) ) ,7) ) +transpose(arpeggio(((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ,4,6) ) ) ,7) ) +transpose(step(((transpose(((transpose((((X+X) |X) |((X|X) |(arpeggio(X) +transpose(X,7) ) ) ) ,-7) +transpose(transpose((X+(X|X) ) ,-5) ,12) ) +(shuffle(((X+X) +((X+transpose(arpeggio(X) ,12) ) +transpose(X,12) ) ) ) +transpose(shuffle(X) ,7) ) ) ,4) +transpose((echo(shuffle(transpose(transpose(X,-5) ,-5) ) ,4,6) +transpose(transpose(((transpose((X|X) ,-5) +transpose(transpose(((X+X) |(X|X) ) ,4) ,7) ) +transpose((transpose(echo(X,4,6) ,4) +((X+(X|(X|X) ) ) +transpose(((X+X) +transpose(transpose(X,-5) ,7) ) ,12) ) ) ,12) ) ,4) ,-5) ) ,12) ) |(((transpose((transpose(((X+transpose(X,7) ) +transpose(X,4) ) ,-5) +echo(arpeggio(echo(X,4,6) ) ,4,6) ) ,4) +transpose(transpose(X,-7) ,7) ) +transpose(transpose(transpose(transpose(echo(echo(transpose(X,4) ,4,6) ,4,6) ,-7) ,-5) ,4) ,4) ) +transpose((transpose(step((transpose(transpose((X+transpose(X,7) ) ,4) ,-7) +arpeggio(transpose(X,-7) ) ) ,12) ,-7) +(shuffle(((X+transpose(X,7) ) |shuffle(echo((X|X) ,4,6) ) ) ) +transpose(((echo((X+X) ,4,6) +X) +transpose((X+transpose((X+step(X,12) ) ,7) ) ,7) ) ,12) ) ) ,7) ) ) ,12) ,12) ) ,7) ) ,4,6) ) ) ) |shuffle(transpose(step(transpose(((shuffle((transpose(step(transpose(arpeggio(X) ,-5) ,12) ,-7) +(((transpose((X+X) ,4) +(((((X+transpose(X,7) ) +transpose(transpose(X,4) ,4) ) +transpose(X,7) ) +transpose((step(X,12) +transpose(X,7) ) ,12) ) |(X|transpose(X,-7) ) ) ) +transpose(transpose(transpose(((X+transpose(X,7) ) +transpose(X,4) ) ,-7) ,-5) ,4) ) +transpose(echo(transpose(transpose(step((transpose(arpeggio(X) ,-5) +X) ,12) ,-5) ,4) ,4,6) ,7) ) ) ) +transpose(((transpose((X+transpose(X,12) ) ,-7) +echo((arpeggio(transpose(X,-5) ) |X) ,4,6) ) +transpose(shuffle(shuffle(transpose((transpose((X|arpeggio(X) ) ,-7) +(transpose((X+X) ,-7) |(transpose(X,-5) +transpose((((X|X) +transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ) ,-7) ) ) ,12) ) ,7) ) +(((((step(echo(transpose(shuffle((arpeggio((X|X) ) +transpose(X,12) ) ) ,-5) ,4,6) ,12) +transpose(((echo((step(X,12) +transpose(X,7) ) ,4,6) +transpose(step(transpose((echo(X,4,6) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,12) ) ,-5) ,12) ,12) ) +step(transpose(echo((X+transpose(X,12) ) ,4,6) ,-7) ,12) ) ,4) ) +transpose(transpose(((((X|(X+transpose(X,12) ) ) +transpose((step(arpeggio(X) ,12) +(X+transpose((X+X) ,7) ) ) ,7) ) +transpose(((((X+transpose(transpose(X,-7) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) +transpose(echo((X+transpose(X,12) ) ,4,6) ,7) ) |transpose(X,4) ) ,7) ) +(transpose(transpose(X,4) ,-5) +(X+transpose(X,12) ) ) ) ,4) ,7) ) +(echo(((shuffle(echo((X+transpose((X+X) ,7) ) ,4,6) ) +transpose((((((echo((transpose(X,-5) +transpose((X+X) ,12) ) ,4,6) +transpose(transpose(X,4) ,4) ) +transpose(((((X+X) +X) +transpose(transpose(X,-7) ,4) ) +transpose(transpose(X,4) ,7) ) ,7) ) +transpose(transpose((transpose(X,-5) |(X|(X+transpose(X,12) ) ) ) ,-7) ,7) ) +transpose(transpose((transpose(transpose((X+X) ,4) ,-7) +transpose(X,-5) ) ,-7) ,4) ) +transpose(step(transpose(X,-7) ,12) ,7) ) ,7) ) +transpose(arpeggio(((transpose(X,-7) +transpose(X,12) ) |shuffle(X) ) ) ,12) ) ,4,6) |((((echo(step((transpose((X|X) ,-7) +(transpose(X,4) +(X+X) ) ) ,12) ,4,6) +transpose(((echo(X,4,6) +transpose(transpose(X,-5) ,4) ) +transpose(arpeggio(X) ,7) ) ,4) ) +transpose((transpose(transpose(transpose(X,-5) ,-5) ,-5) |(transpose(X,-5) |arpeggio((transpose(X,-5) +X) ) ) ) ,7) ) |echo(shuffle((step(shuffle(X) ,12) +transpose((X|((X+transpose(X,4) ) +transpose(X,7) ) ) ,7) ) ) ,4,6) ) +transpose(step((transpose(transpose((X+transpose(X,12) ) ,-7) ,-7) +transpose((((X+(X+transpose(X,12) ) ) +transpose((X|X) ,4) ) +transpose((X+transpose(shuffle(X) ,12) ) ,7) ) ,12) ) ,12) ,4) ) ) ) +transpose((shuffle(transpose(arpeggio(transpose(transpose(arpeggio(step(transpose(X,4) ,12) ) ,-5) ,-7) ) ,4) ) +transpose(arpeggio(transpose((((transpose((echo(X,4,6) |arpeggio(X) ) ,4) +transpose(step(transpose(transpose(X,-7) ,4) ,12) ,4) ) +transpose((transpose(shuffle((X|X) ) ,-7) +transpose(transpose(transpose(transpose(transpose(X,-7) ,-5) ,-5) ,4) ,12) ) ,7) ) |((((X|X) +transpose(transpose(X,4) ,12) ) +transpose(transpose(transpose(step(transpose(X,-7) ,12) ,-7) ,4) ,7) ) +((X+transpose(X,12) ) +step(X,12) ) ) ) ,4) ) ,7) ) ,4) ) +transpose(echo(((transpose(transpose(((transpose(transpose(transpose(X,-5) ,-7) ,-5) +transpose(transpose(step(X,12) ,-7) ,4) ) +transpose(transpose(shuffle(X) ,4) ,7) ) ,4) ,-5) +arpeggio(((transpose(transpose(X,4) ,4) +transpose(step(X,12) ,-5) ) +transpose((X+X) ,7) ) ) ) +(((transpose(transpose(((transpose(X,4) +transpose(arpeggio(X) ,4) ) +transpose(X,7) ) ,4) ,-5) |transpose(transpose((X|(X+transpose(X,7) ) ) ,-5) ,-7) ) +transpose((transpose(arpeggio(shuffle(X) ) ,4) +transpose(((step(step(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,12) ,12) +transpose(arpeggio((((X|X) +transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) ,4) ) +transpose(shuffle(X) ,7) ) ) ,4) ) +transpose(transpose(transpose(((X+X) +transpose((X+X) ,7) ) ,4) ,-7) ,7) ) ,12) ) ,4) ) +transpose((((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose((X+X) ,4) ,12) ) |(transpose((X+X) ,-7) +transpose(arpeggio(transpose(X,-5) ) ,-5) ) ) +((echo(transpose(X,4) ,4,6) +transpose(transpose(X,4) ,7) ) +transpose(((transpose(transpose(X,4) ,-7) +(transpose(X,-5) +transpose(echo(X,4,6) ,12) ) ) |X) ,12) ) ) ,7) ) ) ,4,6) ,7) ) ) ,-7) ,12) ,-5) ) ) random seed used was 177436689 NOTE: Generated phrase was too large ( 6710 ) , it has been truncated at 5000 notes. EXPR = transpose(arpeggio(transpose(transpose(echo(((echo(transpose((((echo(arpeggio(X) ,4,6) +transpose((((X+transpose(X,7) ) +transpose((X|X) ,12) ) |arpeggio(X) ) ,12) ) +transpose(arpeggio(transpose(X,4) ) ,4) ) +(step((X|X) ,12) +transpose(X,7) ) ) ,-7) ,4,6) +transpose(step((step(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,12) |((((transpose(transpose(X,4) ,-5) +transpose(transpose((step(X,12) +transpose(X,-5) ) ,-5) ,4) ) +transpose(transpose((X+X) ,-7) ,7) ) +transpose(X,-5) ) +transpose(((step(X,12) +transpose(X,12) ) +transpose(((step(X,12) +transpose(transpose((X|X) ,4) ,4) ) +transpose(arpeggio((X+X) ) ,7) ) ,12) ) ,12) ) ) ,12) ,4) ) +transpose((transpose(transpose((transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-7) |(shuffle(X) +transpose(((X+transpose(X,7) ) |(X|X) ) ,12) ) ) ,-5) ,-7) +echo(transpose(transpose((transpose((((X|(X|X) ) +transpose((arpeggio(X) +transpose((X+X) ,7) ) ,4) ) +transpose(transpose(X,4) ,7) ) ,-7) |X) ,-7) ,-5) ,4,6) ) ,7) ) ,4,6) ,-7) ,4) ) ,4) random seed used was 0 EXPR = shuffle((((transpose(echo(transpose(transpose(((transpose(transpose(shuffle(((X+transpose(X,4) ) +transpose(X,7) ) ) ,-7) ,-7) |((transpose(X,-7) |X) |step(((X+transpose(transpose(X,4) ,4) ) +transpose(echo(X,4,6) ,7) ) ,12) ) ) |shuffle(((X|transpose(transpose(X,4) ,4) ) +transpose(shuffle(transpose(X,-5) ) ,-7) ) ) ) ,-7) ,4) ,4,6) ,-5) +transpose(transpose(((((((((transpose(((X|X) +transpose(X,12) ) ,4) |X) |transpose(transpose(transpose(X,-5) ,4) ,-7) ) +transpose(((X+transpose(transpose((X+X) ,4) ,4) ) +transpose(transpose((X+X) ,-5) ,7) ) ,7) ) +echo((step(transpose((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(transpose(X,4) ,7) ) ,-7) ,12) |transpose((transpose(shuffle(X) ,4) +(X|X) ) ,4) ) ,4,6) ) +transpose(transpose(transpose(transpose(transpose(X,-7) ,4) ,-7) ,4) ,7) ) |step(transpose((((echo(transpose(X,-5) ,4,6) +transpose(transpose(transpose(arpeggio(X) ,4) ,4) ,4) ) +transpose(((((X+transpose(X,12) ) |(X+transpose(X,12) ) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(transpose((((X+X) +transpose(X,4) ) +transpose(shuffle(X) ,7) ) ,-5) ,12) ) ,7) ) +transpose(((echo(X,4,6) +transpose(X,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,7) ) ,4) ,12) ) +transpose(transpose((((((((X|X) +transpose(X,7) ) +transpose(echo(X,4,6) ,4) ) +transpose(((X+transpose(X,4) ) +transpose(transpose(X,-5) ,7) ) ,7) ) |(X+transpose(transpose((X+transpose(X,7) ) ,-5) ,12) ) ) +shuffle(transpose(((transpose(X,-7) +transpose(X,4) ) +transpose(X,7) ) ,-5) ) ) +arpeggio((X+transpose(X,12) ) ) ) ,-5) ,4) ) +echo((step(((transpose((transpose(transpose(shuffle(X) ,4) ,-5) +(((X|X) |shuffle(X) ) +echo((X|X) ,4,6) ) ) ,4) +transpose(transpose((step(arpeggio(X) ,12) |((X+transpose(X,4) ) +transpose(transpose(shuffle(X) ,-7) ,7) ) ) ,-7) ,4) ) +transpose(transpose(step((X+transpose(X,7) ) ,12) ,4) ,7) ) ,12) |(((transpose(arpeggio(transpose((X+transpose(X,7) ) ,-5) ) ,4) +transpose(transpose(((X+transpose(X,7) ) +transpose(X,12) ) ,-7) ,12) ) |transpose(echo(((X+transpose(transpose(X,4) ,12) ) |transpose(((X+X) +X) ,-7) ) ,4,6) ,-7) ) +transpose((transpose(arpeggio(transpose((echo(transpose(X,4) ,4,6) +transpose((X|X) ,7) ) ,4) ) ,4) +transpose((((((X+echo(transpose(X,4) ,4,6) ) +transpose((arpeggio(X) +(transpose(X,4) +X) ) ,4) ) +transpose(transpose(shuffle(X) ,-5) ,7) ) +transpose((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,-5) ,-5) +transpose(transpose(X,-7) ,7) ) ,12) ) +transpose(transpose(((X+((X+transpose(X,4) ) +transpose(X,7) ) ) +transpose(arpeggio(X) ,12) ) ,-7) ,4) ) ,12) ) ,7) ) ) ,4,6) ) ,-7) ,12) ) +transpose(transpose(shuffle(transpose((((transpose((transpose((arpeggio(X) |X) ,-7) +(transpose(X,-7) +transpose(transpose(X,4) ,7) ) ) ,-7) +transpose(transpose(((transpose(X,-5) +X) |transpose(X,4) ) ,4) ,4) ) +transpose((transpose(transpose(X,-7) ,4) |(transpose((transpose(X,-5) +transpose(X,4) ) ,-5) +transpose(transpose(arpeggio(X) ,-7) ,12) ) ) ,7) ) |arpeggio((((X+transpose(arpeggio(transpose(X,-5) ) ,12) ) +transpose((((((X|X) |(X|X) ) |(X+transpose(X,12) ) ) |shuffle(shuffle(arpeggio(X) ) ) ) +(transpose(step(X,12) ,-5) |(transpose(transpose(echo(X,4,6) ,4) ,-5) +X) ) ) ,4) ) +transpose(transpose((transpose(X,-5) |(X|X) ) ,-7) ,7) ) ) ) ,-7) ) ,-7) ,7) ) |(((((step(arpeggio(((shuffle(transpose(X,-7) ) +(transpose(((X+transpose(transpose(X,-5) ,4) ) +transpose(shuffle(X) ,7) ) ,4) |(((X+transpose(X,12) ) +transpose(X,7) ) +((X+transpose(X,12) ) +transpose((X|X) ,7) ) ) ) ) +echo(transpose(transpose((((X+X) +transpose((X+transpose(transpose(X,4) ,12) ) ,12) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,7) ) ,4) ,-5) ,4,6) ) ) ,12) +transpose(echo((((transpose(echo(transpose(((transpose(X,4) +transpose(X,-5) ) +transpose((transpose(X,-5) +X) ,12) ) ,-5) ,4,6) ,-7) +transpose((((arpeggio((transpose(X,-5) +transpose(X,7) ) ) +X) +transpose(transpose((X|X) ,-5) ,4) ) +transpose((X+transpose(X,7) ) ,7) ) ,4) ) +transpose((transpose(X,-5) +transpose(((X+echo(X,4,6) ) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ,7) ) ,7) ) +(transpose(arpeggio(X) ,4) +transpose((transpose(echo(X,4,6) ,4) +((X+transpose(X,7) ) |X) ) ,12) ) ) ,4,6) ,7) ) +transpose(shuffle(((transpose(((transpose(arpeggio(transpose(transpose(X,4) ,-7) ) ,-7) +transpose((transpose(shuffle(shuffle((X+X) ) ) ,-5) +transpose((transpose((step((X|X) ,12) +transpose(X,-7) ) ,4) +transpose((transpose((X+X) ,4) +echo(X,4,6) ) ,7) ) ,12) ) ,4) ) +transpose(transpose(shuffle(shuffle(((X+transpose(X,7) ) |shuffle(X) ) ) ) ,4) ,7) ) ,-5) +transpose(((transpose((step(transpose(X,4) ,12) |transpose(transpose(((X|X) +transpose(X,12) ) ,-7) ,-5) ) ,-5) +((transpose(((X+transpose((X+X) ,4) ) +transpose(X,7) ) ,-7) |transpose((X|transpose(transpose(X,4) ,4) ) ,4) ) +(transpose(transpose(shuffle(transpose(X,-5) ) ,-5) ,-5) +transpose(echo(arpeggio((X|X) ) ,4,6) ,12) ) ) ) +transpose(transpose((transpose(transpose(X,-7) ,-7) +(((transpose(X,4) |(echo(X,4,6) +X) ) +transpose((((X+transpose(X,12) ) +((X+transpose(X,4) ) +transpose(X,7) ) ) |X) ,7) ) +transpose((arpeggio((X|X) ) +transpose(echo(X,4,6) ,-7) ) ,12) ) ) ,-7) ,12) ) ,4) ) +transpose(((shuffle(shuffle(shuffle((transpose((echo(X,4,6) +transpose((X|X) ,12) ) ,-5) +transpose(transpose(transpose(echo(arpeggio(X) ,4,6) ,4) ,4) ,7) ) ) ) ) +transpose(((((((((transpose(X,-5) |transpose(X,-7) ) +transpose(step(transpose(X,4) ,12) ,12) ) |((arpeggio(transpose(X,4) ) |shuffle(X) ) +transpose((echo(X,4,6) |transpose(echo(X,4,6) ,-5) ) ,12) ) ) +transpose(arpeggio(((X+transpose(transpose(X,-7) ,7) ) |((transpose(X,-5) +transpose((X+X) ,4) ) +transpose(X,7) ) ) ) ,12) ) +transpose((transpose(X,4) |arpeggio(X) ) ,12) ) +transpose(((X|arpeggio(transpose(X,-5) ) ) |((((X+transpose(X,7) ) +transpose((transpose(X,4) +transpose(transpose(X,-5) ,12) ) ,4) ) +transpose(arpeggio(arpeggio(X) ) ,7) ) +transpose(transpose(shuffle(X) ,-5) ,7) ) ) ,4) ) +transpose(echo(((((X+transpose(X,4) ) +transpose(X,7) ) +transpose(step(X,12) ,7) ) |(X|X) ) ,4,6) ,7) ) +transpose(transpose(transpose(step(((X+transpose((X|X) ,4) ) +transpose(transpose((X|X) ,-5) ,7) ) ,12) ,-5) ,-7) ,7) ) ,12) ) +transpose(((shuffle(((((transpose(shuffle(X) ,4) +transpose(transpose(X,-7) ,12) ) +transpose((transpose(X,-7) |(arpeggio(X) +transpose(X,12) ) ) ,4) ) +transpose((((X+transpose(X,7) ) +(X+X) ) +transpose(echo(transpose(transpose(X,4) ,4) ,4,6) ,7) ) ,7) ) +transpose((X+transpose((X+X) ,7) ) ,4) ) ) +transpose(echo(transpose((echo(X,4,6) +(transpose(X,4) +shuffle(X) ) ) ,4) ,4,6) ,4) ) +transpose(transpose(transpose((X+X) ,-7) ,-5) ,7) ) ,7) ) ,7) ) ) ,7) ) +transpose((step(transpose(echo(transpose(step(X,12) ,-5) ,4,6) ,-5) ,12) +transpose(((shuffle((((echo(X,4,6) +transpose((X+X) ,4) ) +transpose(arpeggio(X) ,7) ) +X) ) +transpose(step(shuffle(arpeggio((X+X) ) ) ,12) ,-5) ) +(transpose(transpose(X,-7) ,-5) |transpose((shuffle(transpose(X,4) ) |X) ,4) ) ) ,7) ) ,4) ) +transpose(echo(transpose(echo(transpose((arpeggio(echo(shuffle(((X+transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose((X+transpose(X,12) ) ,7) ) ) ,4,6) ) |echo(arpeggio(X) ,4,6) ) ,-7) ,4,6) ,-5) ,4,6) ,7) ) |(transpose(transpose(transpose((transpose((step(transpose((X+X) ,-7) ,12) |transpose((transpose(((transpose(X,-7) |arpeggio(X) ) |((X+transpose(X,4) ) +transpose(X,7) ) ) ,4) +transpose((transpose(X,4) +((X+transpose(X,12) ) +(X+transpose(X,12) ) ) ) ,12) ) ,-7) ) ,4) +transpose(arpeggio(shuffle((step(transpose((X|X) ,-7) ,12) |step(((X+transpose(X,4) ) +transpose(X,7) ) ,12) ) ) ) ,12) ) ,4) ,-5) ,4) +(((transpose(step((step(((((X+X) +transpose(X,-7) ) |step((X|X) ,12) ) |arpeggio(shuffle(X) ) ) ,12) +(transpose(transpose(X,-7) ,4) +(((transpose(transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ,-5) +shuffle(transpose(X,4) ) ) +transpose(echo(echo(X,4,6) ,4,6) ,4) ) +transpose(((transpose(X,-5) +transpose((X+X) ,4) ) +transpose(transpose(transpose(X,4) ,-7) ,7) ) ,7) ) ) ) ,12) ,-5) +transpose((transpose(((transpose(transpose(transpose((transpose(X,-7) |(X+transpose(X,4) ) ) ,4) ,-5) ,-5) |(((((X+echo(X,4,6) ) +transpose(echo((transpose(X,4) +(X+X) ) ,4,6) ,4) ) +transpose(echo(transpose((X|X) ,-7) ,4,6) ,7) ) +transpose(transpose(transpose(X,-5) ,4) ,4) ) +transpose(transpose((arpeggio(X) +transpose((X|X) ,7) ) ,4) ,7) ) ) |step(step(transpose((X+X) ,-5) ,12) ,12) ) ,-7) |transpose(((transpose(echo(((step(X,12) |arpeggio(X) ) +transpose(((transpose(X,-5) +transpose(transpose(X,-7) ,4) ) +transpose(X,7) ) ,7) ) ,4,6) ,4) +transpose(((X+transpose(X,12) ) +transpose(arpeggio(X) ,12) ) ,7) ) |(transpose(transpose((transpose(X,-7) +X) ,-7) ,-7) +transpose((echo((transpose(X,4) +X) ,4,6) +transpose(((arpeggio(shuffle(X) ) +transpose(echo(X,4,6) ,4) ) +transpose((((X+transpose(X,12) ) |(X|X) ) +transpose(X,4) ) ,7) ) ,-7) ) ,12) ) ) ,4) ) ,12) ) +transpose((transpose(transpose((transpose(arpeggio(transpose(transpose(arpeggio(X) ,4) ,4) ) ,4) +transpose(transpose(arpeggio(X) ,-7) ,-7) ) ,4) ,-5) +arpeggio((transpose(transpose(transpose(X,-7) ,-5) ,-5) +transpose((transpose(arpeggio(transpose(shuffle(shuffle(X) ) ,-7) ) ,-5) +transpose(((transpose(arpeggio(X) ,-5) |(echo(X,4,6) +transpose(((X|X) |X) ,7) ) ) +transpose(transpose((transpose(((arpeggio(X) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ,-7) |(X+transpose(X,12) ) ) ,-7) ,12) ) ,12) ) ,7) ) ) ) ,4) ) +transpose(transpose(transpose((transpose(arpeggio(shuffle((((X+transpose(X,4) ) +transpose(transpose(X,-7) ,7) ) +((transpose(X,4) +transpose(((X+transpose(X,4) ) +transpose(X,7) ) ,4) ) +transpose(X,7) ) ) ) ) ,-7) +transpose(transpose(transpose(X,-7) ,-5) ,12) ) ,-5) ,4) ,7) ) ) ) ) ) random seed used was 0 EXPR = echo(echo(((transpose(step(transpose(((echo((arpeggio(transpose(arpeggio(transpose(X,-5) ) ,4) ) +transpose((shuffle(X) +(transpose(X,-5) |step((X|X) ,12) ) ) ,7) ) ,4,6) +transpose(((transpose(((X+(X+transpose(X,7) ) ) +shuffle(X) ) ,-5) +transpose(transpose(arpeggio(X) ,-5) ,-5) ) +transpose((((transpose((X+X) ,-5) +transpose(transpose(X,-5) ,4) ) +transpose((transpose((X+transpose(X,12) ) ,4) |(((X+transpose(X,4) ) +transpose(X,7) ) |(X+X) ) ) ,7) ) +transpose((transpose((transpose(X,-5) +(X+X) ) ,4) +(X+transpose(X,4) ) ) ,-5) ) ,12) ) ,4) ) +transpose(transpose((transpose((echo(X,4,6) +X) ,-7) |(((transpose(X,-7) +transpose((X|X) ,4) ) +transpose(echo(X,4,6) ,7) ) +transpose(transpose(transpose(X,-5) ,4) ,12) ) ) ,4) ,7) ) ,4) ,12) ,-5) +transpose((arpeggio((transpose((echo(step(((X+transpose(X,12) ) +transpose(X,12) ) ,12) ,4,6) |((transpose(((X+X) +transpose((X+transpose(X,12) ) ,7) ) ,-7) |transpose(step(X,12) ,-5) ) +(transpose(transpose(X,-7) ,4) +transpose((transpose(X,-7) +transpose(X,4) ) ,12) ) ) ) ,4) +transpose(transpose(((shuffle(X) +transpose(arpeggio(X) ,12) ) +(((X+X) |transpose(step(X,12) ,-5) ) |step(((X+transpose(X,4) ) +transpose((X+X) ,7) ) ,12) ) ) ,-5) ,7) ) ) |transpose((arpeggio(transpose(echo((arpeggio(echo(X,4,6) ) +transpose((transpose((X+X) ,4) |X) ,7) ) ,4,6) ,-7) ) |echo(((transpose(((shuffle(transpose(X,4) ) +transpose((X|transpose(X,-7) ) ,4) ) +transpose(arpeggio(echo(X,4,6) ) ,7) ) ,-7) +transpose(((transpose(X,-7) +transpose(step(X,12) ,7) ) |((X+((X+transpose(X,4) ) +transpose(X,7) ) ) +(transpose(X,-5) |(X+transpose(X,7) ) ) ) ) ,12) ) +transpose((arpeggio((transpose(X,-7) |(X|step(X,12) ) ) ) +transpose(step(transpose(X,4) ,12) ,-7) ) ,7) ) ,4,6) ) ,4) ) ,12) ) +transpose(transpose((transpose((((transpose((((((X+X) +transpose(X,12) ) |echo(transpose(X,-5) ,4,6) ) +transpose((X+transpose(X,12) ) ,-5) ) +(((X+X) +X) +shuffle((step(X,12) |(X+transpose(X,12) ) ) ) ) ) ,4) |(transpose(step(shuffle(transpose(X,4) ) ,12) ,4) +transpose(((X+transpose(X,12) ) +(X+transpose(X,7) ) ) ,7) ) ) +transpose((((arpeggio(X) +transpose(echo(step(transpose(arpeggio(X) ,-5) ,12) ,4,6) ,4) ) +transpose(arpeggio(((X+transpose((X|X) ,4) ) +transpose((X|X) ,7) ) ) ,7) ) +transpose((transpose(((transpose(shuffle(X) ,4) +transpose(transpose(shuffle(X) ,-5) ,4) ) +transpose(transpose(X,-5) ,7) ) ,4) +transpose(transpose(X,-5) ,4) ) ,7) ) ,4) ) +transpose(((transpose(((X+transpose(transpose(X,4) ,4) ) +transpose((X+X) ,7) ) ,-5) |step(X,12) ) +transpose((transpose(transpose(X,4) ,4) +transpose((transpose(X,4) |X) ,7) ) ,7) ) ,7) ) ,-5) |echo((((transpose(X,-7) +transpose(transpose(X,-7) ,12) ) +transpose((X|X) ,12) ) +((X+(X+transpose(X,7) ) ) +transpose(X,7) ) ) ,4,6) ) ,4) ,12) ) ,4,6) ,4,6) random seed used was 0 NOTE: Generated phrase was too large ( 8025 ) , it has been truncated at 5000 notes.

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