Helix Stadium XL (FW 1.3.1): "Envelope" missing from Controller list for Amp Master?

[Adi7771]

Hi everyone,

I need help with my Helix Stadium XL running firmware 1.3.1. I’m trying to control the Master Volume of my amp (Ampeg SVT-4 PRO) using my playing dynamics (picking strength), similar to how the "Envelope Follower" works on a Roland VG-99.

The problem: > When I go to "Controller Assign" for the Master parameter, the "Envelope" option is missing from the Controller list. I can see options like Exp 1-3, Stomp A1-B10, Triggers, and X/Y Axis, but no Envelope.

I have already checked:

1. Global Settings > Ins/Outs: I couldn't find any "Input Dynamic" toggle there.
2. Command Center: The "Drum" icons (which I assume are for audio analysis) are greyed out and non-clickable.
3. HX Edit: The right-click menu on the Master slider is very limited and doesn't show "Controller Assign".

Is the Envelope controller hidden in a different menu in the Stadium XL version? Do I need to activate a specific "Dynamic" block or setting first? I am using a fretless bass and really need this "touch-sensitive" volume response.

Any help would be greatly appreciated!

[t-ario]

On 3/29/2026 at 5:55 AM, Adi7771 said:

Do I need to activate a specific "Dynamic" block or setting first?

 

I suspect you need to use a filter block with the corresponding filter?!?

Maybe also dynamics?!?

[silverhead]

I think you’re looking for something that doesn’t exist in the Stadium. There is no Envelope controller. You will need to explore other FX blocks to see if you can find something that will provide the touch sensitivity you want.