http://donslepian.com/You might recognize the custom DIY modular from this post (comments enabled there).
EVERYTHING SYNTH
http://donslepian.com/
image via here.
flickr by Mr. Biggs
"Gotharman’s note randomizer are a MIDI effect, that treats incoming MIDI note on and off's. When it receives note data, it takes a look at the adjustable probability parameter, and the velocity value, if Velo to Prob is other than zero, and randomly decides if it will play that note or not. If it decides to play the note, it will have a look at the adjustable random velocity parameter, and if this is higher than zero, it will randomize the note velocity value with the adjusted amount. This effect is very useful for creating variations in otherwise repeating patterns."