...as far as I can tell it doesn't quite support how I want this to work. I would like to use a continuously-variable controller (e.g. ribbon, foot pedal, mod wheel) to control the amount of growl, i.e. how loud the growling sample plays.

A switch, like a light switch, is, indeed, either On or Off... So you are correct, the [AF1] and [AF2] not "continuously-variable" controllers. They are switches.

As I stated in one of your other posts on this same subject, the Ribbon is a continuously variable controller but will work from Center to Right only (positive values), all values sent from the Left of the center point will all be negative values (less than 0) and therefore meaningless for your application.. Foot Controller is a better candidate as it matches your requirement of Minimum through Maximum.

Mod Wheel is another good selection as it sends cc001 from minimm to maximum which sounds more like the controller behavior you actually are describing. Certainly, a Switch is not continuously variable

Again of course you could assign it to the Ribbon - nothing will prevent you, as long as you know you only can use the Ribbon to the right side of Ribbon's center point.

Once you have decided on a physical controller, you need to assign volume control to this particular application... So you can bring in the growl Element using an appropriate physical controller. AfterTouch is another good candidate to control the level of your growl Element.
You may also consider fading out the Elements that are non-growl with the same controller that brings in the growl.

That's great. Can you tell me how to set, for instance, the foot control to do this?

I have only been able to find ways to set A.Func 1 or 2.

Thanks...

I looked into this some more. The XA Control setting for a voice element only includes AF1 and AF2. This is what I previously found, and will not allow me to set it to be foot control.

The Ctrl Set page in the voice common edit section will allow me to choose foot control, but there doesn't seem to be a way to have that controller affect the volume of a particular voice element.

These are the only places I've found where I might be able to do this, so I'm stumped at the moment.

I got it all figured out!

I had a couple of problems:

* I had not found the E-Level control destination, and

* I did not realize that the controller value is added to the original setting.
I thought it replaced the original setting.

As a result, I would set things up and the controller would have no effect at all on anything.

Once I figured these two things out, I was able to set my growling saxophone voice up just the way I want it to be.

Thanks…

Excellent!