I had some problem of “clic” sound on my VCDO Additive module
i change to the FM version, work well when i tested it …
and today i want to do a vid for my webblog, and … Clic Clic Clic
The real problem is when i used a trigger sigal, go in an Envelope then in a Buffered Multiple and in a VCA
i have some clic
if i Multiply the Trigger signal and after in an Envelope G (then in a VCA) all is clear like some water 
so i change the Additive for a FM for nothing, it wasn’t the module but my patch.
I ll build an Additive for my next case