Multiple waveguide models module.

Sliders under the graph:
-Base Freq: Base pitch of the waveguides (in Hertz).
-WG Expansion: Spread factor that determines the range between the waveguides.
-WG Feedback: Length of the waveguides (**à vérifier; en quelle unité?).
-Filter Cutoff: Cutoff or center frequency of the filter (in Hertz).
-Amp Dev Amp: Amplitude of the jitter applied to the waveguides amplitudes.
-Amp Dev Speed: Frequency of the jitter applied to the waveguides amplitudes.
-Freq Dev Amp: Amplitude of the jitter applied to the waveguides pitch.
-Freq Dev Speed: Frequency of the jitter applied to the waveguides pitch.
-Dry/Wet: Mix betwwen the original signal and the waveguides signals.

Dropdown menus and toggles:
-Filter Type: Type of the filter used in the module (lowpass, highpass, bandpass or bandstop).
-Balance: Adjust the signal amplitude by comparing it with a sinusoidal wave with a fixed amplitude (see "compress") or with the amplitude of the source (see "source").
-# of Polyphony: Number of voices played simultaneously (polyphony); only available at initialization time.
-Polyphony Spread: Pitch variation between polyphony voices (chorus); only available at initialization time.

Graph only parameters:
-Overall Amplitude: The amplitude curve applied on the total duration of the performance.