it's common to refer to doepfer modules by their number, not their name - weird I know as it's difficult to remember!
googling the doepfer a-147-2 vcdlfo - https://www.google.com/search?client=firefox-b-d&ei=RclIX_T9Ao7UsAe-q6EI&q=youtube+doepfer+a-147-2&oq=youtube+doepfer+a-147-2&gs_lcp=CgZwc3ktYWIQDDIFCCEQoAE6BAgAEEdQwLwBWMC8AWDL4gFoAHABeACAAViIAaoBkgEBMpgBAKABAaoBB2d3cy13aXrAAQE&sclient=psy-ab&ved=0ahUKEwi0tIeJxr3rAhUOKuwKHb5VCAEQ4dUDCAw
lots of videos - but basically it's a resetable lfo with 4 waveforms, that has a vca attached which will open and close with the rise and fall of the delay lfo (unless something is plugged into the vca cv in - if nothing is plugged into the input then the triangle doepfer is sent to the vca input) and a delay which triggers after the lfo and starts a ramp which opens the vca and holds it open until re triggered - unless something else is plugged into the vca cv in - the delay ramp can also be patched to something else
same with the a-171-2
basically slew is the rate at which a signal changes - a slew limiter slows this down - you have 2 ways of limiting the slew of a waveform - on the way up and on the way down - so you can take a waveform that looks like this |\ and turn it into one that looks like this /\ by altering the up-slew amount and then to this /| by altering the down-slew
if nothing is patched to the input and trigger is sent to the trigger input then a single envelope based off the up-slew/down-slew will be output
if the cycle switch is engaged - then it becomes an lfo based on the up-slew/down-slew
midi out of elektron to midi in of module - set elektron midi channel to the same that the module is set (read manual on how to set this) - at a guess - cv1 is pitch - patch this to the voct of a vco - patch gate to envelope
hope this helps - might be a good idea to get a basic oscilloscope - so you can see what is happening to your waveforms
"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