[FEATURE] Improved randomness in Wow

[jatinchowdhury18]

Is your feature request related to a problem? Please describe.
The Wow processing is a little too plain and predictable.

Describe the solution you'd like
Some control to add randomness to the wow processing (maybe Brownian motion...)

[jatinchowdhury18]

Idea: 2 processes to add some interesting flavor to the wow effect:

1. Variance: very slow modulating of the wow frequency over time (maybe a skewed sine wave?).
2. Drift: random process to randomly let the wow value drift over time (Maybe an Ornstein-Uhlenbeck process?)

[jatinchowdhury18]

An updated wow algorithm is now live in the Nightly Builds in case anyone want to try them out. There may be some more fine-tuning to come.