Caustic Song file (optional):
Automatically and randomly (if you use noise as the LFO control method) chooses notes and volumes.
Can be controlled via octaves and LFO speed.
For example, in the included file, the first 16 bars are set for 3 octaves which lowers the probability a note will be chosen. Measures 16 - 32 are set for 2 octaves giving a 50% probability or something like that, probability equations aren't my forte.
Measures 48 - 64 are set for 0 octaves meaning a note will be chosen on every beat or fraction of a beat depending on how the rate is set, in this case every 16th note. So every 16 measures you will hear an increase in how many notes are played due to the difference in the octave setting changing.
Doubling any note increases the probability the arpeggiator will select that note depending on the octave setting.
Not perfect but it is actually functional and musically useable, also practical as it doesn't require multiple synthesizer slots to randomize a single drum/ perc sound.
Not at all intended as a criticism of nitro's work, his cool and intriguing contribution inspired me to throw this out there, maybe others can improve it. For me, the issue with nitro's example is I cannot yet see a functional use for it but then again I'm not the brightest candle.
Track 5 of the included example is a throwaway track to help define where beat 1 is, usually not an issue in a song, but when its just random percussion...