There is this post here from many years ago: "Hidden" Vowel Filter Device!
and I recently talked with someone about it.
On the same note, I think from a user perspective it would be better to have only one filter device, then be able to select analog or digital or any kind of filter type within that one device.
So why not clean that all up and just make a single filter device with all the options.
Digital, analog or “hidden”.
I think that would be a good improvement over hopefully little work.
Yes, you need to set “Dry/Wet” it to 100% wet so that the filter has full effect. But then you also need to set the “Depth” to zero %, else you will get a vibrato like effect from the Chorus engine.
Vowel Reso is subject to taste, sometimes you want the full, sometimes a little less. Too little, will not seem to have strong effect, but sometimes it’s useful, too.