I think the time range of the Voyager envelope parameters can be found in the manual. You can download it from the Moog website.
Otherwise, you can do it by ears instead of exactly matching the values… unless you only have a patch sheet of course.
I’m always puzzled when people try to match patches only following the parameters values. I used to think this way but I now consider the sound and feeling rather than the theory.
So, not to mess with you, just out of curiosity and because nobody gave me a real answer yet: (why) is it more important for you to match the values rather than have them near the original and adjusting according to what your ears tell you?
I have a patch book in front of me with 104 patches and don’t have a clue how they should sound like.
without any sound sample to compare i cannot adjusting according to what my ears tell me.
well, for instance “The New Moog Sound” or “Pot Cover” patches, its naming sounds nice, but it is hard to adjust the ADSR/filter accordingly to just its naming.
anyway, it would be a nice creative idea but I am sure with my poor sound programming expirience far away from how the original patch should sound like.
I’ve sometimes met some musicians who wanted to have the exact-right-value-no-matter-how-it-sounds: that’s what I have hard times to assimilate
That being said, I’m sure that -except for some parameters as fine osc tuning of LFO amount over pitch- you would get most of the character of any patch just approximating the values.