I think AT is overrated - it's been in the specs since beginning of midi 1984 or whenever it was agreed upon. And still it's not standard in keybeds implemented today - it exist - but more like an exception. That tells a story.
Think about a grand piano and how much a pianist need to practise to really squeeze nuances out of it. It could be by velocity alone as midi.
So look at how Nordlead did it - to make synth expressive.
In common terms you could say they got 20+ cross mod from velocity as source - to every knob on the panel, which is every parameter. Nothing hidden in menu systems - there is no menues even.
And you have individual amount on each of those modulation channels by simply setting min/max of each knob.
This is how it works and as simple as it gets:
- set knobs as you want them as basic sound
- press Assign button
- turn knobs to other position - to go depending on velocity.
- press Assign again
- done
This opens up to make every preset/patch you make as expressive as a separate instrument if you want - based on velocity. Like a pianist learn to handle keys on a grand piano with nuances.
Add to that layer 4 parts with individual like above. 20 voices to even use for unison stuff.
If not wanting this on velocity - you can assign to mod wheel - and morph with that or expression pedal.
This is unrivaled as far as I saw. Monosynth like Matrix Brute probably with 16x16 true matrix - with as many sources and destinations.
Kingkorg had 6 channels each on layer A and B - with numerous sources and destinations.
Not sure why they dropped that completely in Prologue - didn't people appreciate that?
Clever thing with multi engine - but why drop cross mod stuff?
The true VCO synths like Prophet also have rather few cross mods - so maybe part of reason that voltage is more difficult to do than digital.
Pitch envelope is common to filter and pitch - which limits severly. For effects only to use pitch basically - unless you have sustain at zero - you end up out of tune, and cannot go octave high either.
I have a lot to discover in Prologue still - just had it for 4 days.
Extended almost all slots with user oscillators - bought a couple too.
https://sellfy.com/soundmangling
He has good videos that shows what they do - so don't need to take a chance. And he doesn't charge that much $5-$7.
And those vpm stuff too - brings a lot as third oscillator.
The journey has started to see where Prologue takes me.