Sound Effector in Plexus simply samples the sound spectrum and applies it to Position, Color or Scale of the vertices in Plexus. You can select specific frequency ranges from the sound layer. The Frequency Sampling part is modeled after AE’s Audio Spectrum effect. The best way to learn more about the Sound Effector is to watch this tutorial and see it in action.
Sound Layer: The layer from which the audio should be sampled from. Can be any layer in AE with audio data.
Sound Start/End Amplitude: The Amplitude applied from start to the end. If there is no Echo only Start Amplitude is applied. If there is Echo it starts with Start Amplitude and ends with End Amplitude.
Frequency Begin/End: The Frequency range to sample from the audio data. Sometimes a few frequencies dominate the audio and this is useful to eliminate them from the spectrum if necessary.
Sample Duration: The duration of sound samples analyzed to create the spectrum. The longer the duration is, the slower the spectrum reacts to sound. Short durations can lead to really audio reactive, often jittery spectrums.
Echo Time Delay: If you apply the same spectrum to all the points, it gets rather dull. So, you can sample the audio over time and echo it. Simply, it creates multiple spectrums from audio data over time and applies it along the z or y indices.
Now that you have your audio spectrum sampled, you can apply it to Position, Color and Scale all at the same time.
Position Factor: Multiplies the amplitude by this factor just before applying it to the position of the vertices. This is useful if you want to have different amplitude settings for Position, Color and Scale.
Apply Sound To Axis: If you’re applying the sound spectrum to position, you can apply it to X,Y,Z axes or along the Normal of the vertex.
Scale Factor: Multiplies the amplitude by this factor just before applying it to the scale of the vertices. This is useful if you want to have different amplitude settings for Position, Color and Scale.
Color Factor: This factor helps you change the color across the gradient faster or slower. This is useful if you want to have different amplitude settings for Position, Color and Scale.
Color Gradient: Apply one color when the amplitude is zero and apply another color when the amplitude is high. Also, apply another color when the amplitude is medium. You can have as many colors as you want in the gradient. The color is applied depending on the amplitude of the current frequency. It’s like an Equalizer.
The best way to learn more about the Sound Effector is to watch this tutorial and see it in action.