August 10th, 2012,05:26 AM
I don't think it is possible with instances, but you could probably make one ''master node'' where you tweak your settings, then make ''instances'' of that node by linking all the knobs with expressions. Then for the random value, you could use something like (amplitude*random(frame*frequency+seed)+offset-(0.5*amplitude)) then for the seed use the number of the node's name which should be different for each node. (you can get it by using the "split" and "lindex" functions to extract the number from the node's name)
Hope this helps.