PlatinumVerb provides the following reverb parameters.
Initial Delay slider and field: Set the time between the original signal and the diffuse reverb tail.
Spread slider and field: Control the width of the reverb stereo image. At 0%, the effect generates a monaural reverb. At 200%, the stereo base is artificially expanded.
Crossover slider and field: Set the frequency used to split the input signal into two frequency bands, for separate processing.
Low Ratio slider and field: Determine the relative reverb times of the bass and high frequency bands. It is expressed as a percentage. At 100%, the reverb time of the two bands is identical. At values below 100%, the reverb time of frequencies below the crossover frequency is shorter. At values greater than 100%, the reverb time for low frequencies is longer.
Low Freq Level slider and field: Set the level of the low frequency reverb signal. At 0 dB, the volume of the two bands is equal. In most mixes, set a lower level for the low frequency reverb signal. This lets you boost the bass level of the incoming signal, making it sound punchier. This also helps to counteract bottom-end masking effects.
High Cut slider and field: Filter frequencies above the set value from the reverb signal. Uneven or absorbent surfaces—wallpaper, wood paneling, carpets, and so on, tend to reflect lower frequencies better than higher frequencies. The High Cut filter replicates this effect. If you set the High Cut filter so that it is wide open (maximum value), the reverb sounds as if it is reflecting off stone or glass.
Density slider and field: Set the density of the diffuse reverb tail. Ordinarily you want the signal to be as dense as possible. In rare instances, however, a high Density value can color the sound, which you can fix by reducing the Density slider value. Conversely, if you select a Density value that is too low, the reverb tail sounds grainy.
Diffusion slider and field: Set the diffusion of the reverb tail. High Diffusion values represent a regular density, with few alterations in level, times, and panorama position over the course of the diffuse reverb signal. Low Diffusion values result in the reflection density becoming irregular and grainy. This also affects the stereo spectrum. As with Density, find the best balance for the signal.
Reverb Time slider and field: Determine the reverb time of the high frequency band. Most natural rooms have a reverb time somewhere in the range of 1 to 3 seconds. This time is reduced by absorbent surfaces, such as carpet and curtains, and soft or dense furnishings, such as sofas, armchairs, cupboards, and tables. Large empty halls or churches have reverb times of up to 8 seconds, with some cavernous or cathedral-like venues extending beyond that.