something simple like full rail to rail output with 0 as zero for envelopes. (what you get anyways)
say you made something g with a really different modulation for the filters, you could have that connected to an output. then someone else may have made a fairly simple lfo phaser but it had an aux input, then the complex mod from the other device could control the phaser, and it would be exactly in sync.
it makes the scope routing window in to a sort of "meta modular"
speaking of modular, since the modular already has plenty of outputs and you usually use 2, its easy to make a patch that uses 3 and 4 as aux. thats where this comes in you could easy make mods controlled with 14 bit BC modular
![:)](./images/smilies/icon_smile.gif)
from now on there will be extra inputs and outputs on the far and few between devices i make. called "aux" which can have a audio or control signal for instance "ParaDox* will have 2 aux inputs. switchable envelope follower could be added, but maybe a simple enevlope follower device for all is in order.
anyways its not hard to add it to your devices, if you are inputting to a poly synth you can put a "2nix" in there, it changes monophonic signals to be available for every note of polyphony.
if its a poly signal in your device, send it through an additional polymix to the aux out.