Envelope curve options: which is closest to a particular analog ADSR?

Elektron Gear Analog Keys/Four
#1

I’m trying to emulate the response of the analog envelope on my Intellijel Atlantis. Which of the many curve options will get me there? I’m thinking 3 or 4, but if others have been through this, I’d love to know. I realize that there’s a wide range of “analog” envelopes, and I’m trying to emulate the response range of this one in particular:

Of course, I could just use the envelope on the Atlantis, but if I can do the envelope inside the A4, then I can P-lock it, have different presets ready to go, etc.

#2

Without any proper docs of the hardware the best way is to examine a recording to see visually how the envelope shapes a (simple) sound. Everything else would be simply guess-work.

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#3

You have an AF and an Atlantis, so you could compare them yourself. There are only 6 shapes to try!

Intellijel has useful information (PDF):

Since the Atlantis tries to emulate the SH-101, you could also use existing information on the internet:
https://www.google.com/search?client=firefox-b-d&q=SH-101+envelope+shape

#4

AFAIK the A4 doesn’t provide the wanted logarithmic form of the attack phase which is very typical for hardware envelopes (it’s the loading curve/power saturating of a capacitor).

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#5

Exponential you mean?

#6

No. The attack phase isn’t exponential (as can be seen in the pdf above). It’s curved the other way around. It starts rising fast and then approaches the end slowly. As I wrote: that’s a typical curve when you load up a capacitor.