SilverVerb controls in Final Cut Pro for Mac
SilverVerb provides a low-frequency oscillator (LFO) that can modulate the reverberated signal. It also includes high cut and low cut filters, allowing you to filter frequencies from the reverb signal. High-frequency transients (short bursts of amplitude, normally at the onset of a sound) in reverb signals can sound unpleasant, hamper speech intelligibility, or mask the overtones of the original signal. Long reverb tails with a lot of bass generally result in an indistinct mix.
To add the SilverVerb effect to a clip and show the effect’s controls, see Add Logic effects to clips in Final Cut Pro for Mac.

- Predelay knob and field: Set the time between the original signal and the reverb signal. 
- Reflectivity knob and field: Define how reflective the imaginary walls, ceiling, and floor are. 
- Size knob and field: Define the dimensions of the simulated room. 
- Density/Time knob and field: Determine both the density and the duration of the reverb. 
- Low Cut slider and field: Filter frequencies below the set value out of the reverb signal. This affects only the tone of the reverb signal, not the original signal. 
- High Cut slider and field: Filter frequencies above the set value out of the reverb signal. This affects only the tone of the reverb signal, not the original signal. 
- Modulation On/Off button: Enable or disable the LFO. This affects the Rate, Phase, and Intensity parameters. 
- Rate knob and field: Set the frequency, or speed, of the LFO. 
- Phase knob and field: Define the phase of the modulation between the left and right channels of the reverb signal. - At 0°, the extreme values (minimum or maximum) of the modulation are achieved simultaneously on both the left and right channels. 
- At a value of 180°, the extreme values opposite each other (left channel minimum, right channel maximum, or vice versa) are reached simultaneously. 
 
- Intensity slider and field: Set the modulation amount. A value of 0 turns off the delay modulation. 
- Dry and Wet sliders and fields: Set the balance between the effect (wet) and original (dry) signals. 
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