Girth Effect Visualizer Uses Randomized Values on Each Adjustment

[Lunix-420]

Description:
The Girth effect mixes the value with a randomized value to add high frequencies. The current UI implementation uses the same function to graph the visualizer of the Girth effect. As a result, each slight adjustment rerolls the entire graphic because new values are rolled every time the slider gets touched. To provide a consistent visual representation, we should use a fixed seed when calculating the Girth effect for the UI representation.

Steps to Reproduce:

1. Load Plasma in a compatible host.
2. Adjust the Girth effect slider.
3. Observe the visualizer of the Girth effect.

Expected Behavior:
The visual representation of the Girth effect should be consistent with each adjustment, using a fixed seed for the random values to ensure the graphic does not reroll entirely with every slight adjustment.

Actual Behavior:
The visual representation of the Girth effect rerolls and changes completely with each slight adjustment due to new random values being calculated.

Operating System:
This issue is reproducible on all operating systems (Windows, MacOS, and Linux).

Plugin Version:
1.2.0

Additional Notes:
Fixing this issue will enhance the user experience by providing a more stable and predictable visual feedback when adjusting the Girth effect. This is important for sound design as it allows users to better understand the impact of fine adjustments.