As has been stated you can use modules that generate chords, but this is actually fraught with frustrations - ie it's a real pain in the ass to keep everything in key
or you could use a multi-channel precision adder (or 2) to transpose
or you can use a sequencer with a lot of channels - where you have to program every note in etc
or you can get a sinfonian - the uber-quantizer/chord progression sequencer
personally after considering all the choices - I'm going to go for a Sinfonian
the other issue of this and most of the other options is how to actually play the chord - there are only a few polyphonic modules - I'm going to go with an Expert Sleepers General CV (and midi expander) and send chords to both the general midi and to some va keyboards and a stage piano that I have
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities