well, no harm no foul 
sorry to be touchy about it.
but anyways i do mostly know what is actually going on in 200e designs in particular; i forget things mostly because of time (292e initial design was over 18 years ago, which makes me feel ridiculously old.)
anyways i’ll keep going for a bit on this topic b/c the module is kind of an interesting case study.
292 (original) has 4 cv “level” inputs, 4 audio inputs, 4 audio outputs, and mode switches, and as you say all amp controls are vactrol.
in addition to the changes mentioned (digital layer under the pots, opamp control of gate-mode paths), the 292e adds:
- 4 additional cv inputs for “velocity” on each channel. basically when a “velocity” input is patched, it acts as a multiplier for the level input. this opens up a lot of utility for the module as an automated mixer, for example. (you can adjust the levels “post automation.”) this logic is done in firmware.
- level and velocity can be controlled independently in realtime via i2c without patch cables. (as can gate/lpg mode by means of “preset” recall.)
these are neat ideas and really make the thing more useful as 1/2 or 1/4 of a “standalone instrument,” esp. with the line levels not requiring additional amp/att to interface with outside signals.
now - the 200e stuff was spec’d out in the late 90’s. it has severe technical troubles; AD/DA rates make the CV inputs useless for fast modulation. there is noticeable stepping in some cases, there is clock bleed on audio paths. the current brand owners have no interest in evolving the designs and want to crank out clones and softsynth licenses. so for me, it’s time to see these modules as purely one source of design ideas. one of my favorite things about don’s process was his willingness to radically evolve those designs and some of the clever touches he made to deepen their use cases.
