Whammy flutter

have you considered using a guitar's vibrato for this effect?

as far as I know the flutter fx is done with the vibrato bar being struck with a single short beat to it. Don Peterson is right!

At least this is what Steve Vai is calling it. The strike to the vibrato bar produces a strong vibration to the coils and then this vibration is transfered to the strings, thus the flutter fx.
You can check it at the end of the song Blue Powder when Vai plays some notes on top of just the keyboard...

check the video at minute 5:25: vibrato bar flutter

hope this helps

@DonPetersen -- What if you have a Les Paul?

@malthusian -- Also, check out this John Petrucci vid in which he shows the technique.

The section you want starts at 04:55

I think @malthusian is very aware of the technique and was asking for help creating it without using a trem

It's a very old and well used trick but I'm not sure how to create it using the whammy effect so I can't help I'm afraid.

Quote from Tritium

@DonPetersen -- What if you have a Les Paul?

Les Trem II
[Blocked Image: https://www.gitarrebass.de/wp-content/uploads/2015/08/[email protected]]

[Blocked Image: http://tremolos.com/wp-content/uploads/2015/10/Floyd-Rose-FRX-Les-paul-1.jpg]The Floyd Rose FRX is a surface mount tremolo designed for Les Pauls.

try using a chromatic shift in co junction with morphing and the virbrato?

Quote from malthusian

I am guessing that to emulate the effect one has to have a vibrato where the speed starts out really fast and slows down really quickly plus the vibrato (pitch) intensity starts high and decreases proportionally to the speed ramp.

Correct weight, mate; good thinking.

Quote from malthusian

i have a tyler variax that has a rather nice graphtech tremolo that will flutter...

The problem with the trem setup on them is the multicore wire's mass / inertia. I went to great lengths to carve an unimpeded path for it to travel in order to reduce its dampening effect. Basically, it acts like a shock absorber and therefore reduces the excursions of the flutter movement and shortens the die-down time. This included bending the ribbon cable on the motherboard and installing those tacks that hold wire onto skirting boards onto the inner surface of the cut-away to help guide the multicore wire into a straighter path through the hole to the motherboard.

Reducing spring tension to the minimum you can live with is the most-effective action I've tried, I'm afraid.

Another thing to consider is either adding weight to the trem arm or replacing it with a longer / thicker one. This'll make it more-resilient to inertial damping. The crudest-and-cheapest method I can think of is gaffer taping a small fishing sinker as close to the end of the arm as you can live with. That'll theoretically give you mass where you need it in spades; tailor the effect by varying the sinker's size and position.

These measures will help get you further into the ballpark than your "noob" skills are allowing; I have the same problem!

As for electronically producing the effect in the Kemper, I think your theory is sound. Off the top of my head I can't see why you shouldn't be able to morph those parameters. Use the mix % control to fade out as you reduce the depth (excursion amount) and speed. You could keep it permanently-active, but with a 0% mix at, say, the foot-controller's heel position, and take it from there.

Please try this again; the more I think about it, the more-convinced I am it could be done. The only caveat might be the vibrato speed - is there a limitation there?